“So firm is the ground upon which these Gospels rest, that the very heretics themselves bear witness to them, and, starting from these [documents], each one of them endeavours to establish his own peculiar doctrine. … all who destroy the form of the Gospel are vain, unlearned, and also audacious … For if what they have published is the Gospel of truth, and yet is totally unlike those which have been handed down to us from the apostles, any who please may learn, as is shown from the Scriptures themselves, that that which has been handed down from the apostles can no longer be reckoned the Gospel of truth. But that these Gospels alone are true and reliable.”

Exerpt from Ante-Nicene Fathers, Vol I, Irenaeus, "Against Heresies," Book III, Ch. XI

"Having therefore the truth itself as our rule and the testimony concerning God set clearly before us, we ought not, by running after numerous and diverse answers to questions, to cast away the firm and true knowledge of God. … Being most properly assured that the Scriptures are indeed perfect, since they were spoken by the Word of God and His Spirit; but we … are inferior to, and later in existence than, the Word of God and His Spirit."

God is not to be sought after by means of letters, syllables, and numbers; necessity of humility in such investigations.

1. If any one, however, say in reply to these things, What then? Is it a meaningless and accidental thing, that the positions of names, and the election of the apostles, and the working of the Lord, and the arrangement of created things, are what they are? - we answer them: Certainly not; but with great wisdom and diligence, all things have clearly been made by God, fitted and prepared [for their special purposes]; and His word formed both things ancient and those belonging to the latest times; and men ought not to connect those things with the number thirty, but to harmonize them with what actually exists, or with right reason. Nor should they seek to prosecute inquiries respecting God by means of numbers, syllables, and letters. For this is an uncertain mode of proceeding, on account of their varied and diverse systems, and because every sort of hypothesis may at the present day be, in like manner, devised by any one; so that they can derive arguments against the truth from these very theories, inasmuch as they may be turned in many different directions. But, on the contrary, they ought to adapt the numbers themselves, and those things which have been formed, to the true theory lying before them. For system does not spring out of numbers, but numbers from a system; nor does God derive His being from things made, but things made from God. For all things originate from one and the same God.

2. But since created things are various and numerous, they are indeed well fitted and adapted to the whole creation; yet, when viewed individually, are mutually opposite and inharmonious, just as the sound of the lyre, which consists of many and opposite notes, gives rise to one unbroken melody, through means of the interval which separates each one from the others. The lover of truth therefore ought not to be deceived by the interval between each note, nor should he imagine that one was due to one artist and author, and another to another, nor that one person fitted the treble, another the bass, and yet another the tenor strings; but he should hold that one and the same person [formed the whole], so as to prove the judgment, goodness, and skill exhibited in the whole work and [specimen of] wisdom. Those, too, who listen to the melody, ought to praise and extol the artist, to admire the tension of some notes, to attend to the softness of others, to catch the sound of others between both these extremes, and to consider the special character of others, so as to inquire at what each one aims, and what is the cause of their variety, never failing to apply our rule, neither giving up the [one] artist, nor casting off faith in the one God who formed all things, nor blaspheming our Creator.

	CHURCH FATHERS: The works of those commonly called or traditionally called "Church Fathers" ought to be resorted to not as the Father's of the Church, for this term in a Biblical and correct sense is reserved for those Apostles and Prophets by whose writings and revelations the Church from the beginning is established and built up. Jesus himself warned, and Paul warned, and John warned, of a darkness and an era of apostacy that would come upon the Church, even a flood, which would be spewed out of the mouth of the dragon, a mystery of iniquity, which would if possible deceive even the elect, if it were possible. In the greater context of the end times, the Church Fathers, in so many volumes preserved, are the record of that falling away that would come and that would allow the man of sin - the Antichrist - to be revealed (2 Thessalonians 2:3). After the good begining of the Gospel, we watch, in these writings and epistles, as the overseers (episkopous) and bishops themselves begin to stray from the Gospel that was originally preached, and finally turn aside "speaking perverse things, to draw away disciples after them," (Acts 20:28-30). Let all those who seek the truth of the Gospel, refer to the Gospel, to Christ the source and the Spirit of holiness, but let us not establish Christian doctrine upon the corruptions and traditions of men. Read the Writings of the "Church Fathers" >>

3. If, however, any one do not discover the cause of all those things which become objects of investigation, let him reflect that man is infinitely inferior to God; that he has received grace only in part, and is not yet equal or similar to his Maker; and, moreover, that he cannot have experience or form a conception of all things like God; but in the same proportion as he who was formed but to-day, and received the beginning of his creation, is inferior to Him who is uncreated, and who is always the same, in that proportion is he, as respects knowledge and the faculty of investigating the causes of all things, inferior to Him who made him. For thou, O man, art not an uncreated being, nor didst thou always co-exist with God, as did His own Word; but now, through His pre-eminent goodness, receiving the beginning of thy creation, thou dost gradually learn from the Word the dispensations of God who made thee.

4. Preserve therefore the proper order of thy knowledge, and do not, as being ignorant of things really good, seek to rise above God Himself, for He cannot be surpassed; nor do thou seek after any one above the Creator, for thou wilt not discover such. For thy Former cannot be contained within limits; nor, although thou shouldst measure all this [universe], and pass through all His creation, and consider it in all its depth, and height, and length, wouldst thou be able to conceive of any other above the Father Himself. For thou wilt not be able to think Him fully out, but, indulging in trains of reflection opposed to thy nature, thou wilt prove thyself foolish; and if thou persevere in such a course, thou wilt fall into utter madness, whilst thou deemest thyself loftier and greater than thy Creator, and imaginest that thou canst penetrate beyond His dominions.

Knowledge puffeth up, but love edifieth.

1. It is therefore better and more profitable to belong to the simple and unlettered class, and by means of love to attain to nearness to God, than, by imagining ourselves learned and skilful, to be found [among those who are] blasphemous against their own God, inasmuch as they conjure up another God as the Father. And for this reason Paul exclaimed, “Knowledge puffeth up, but love edifieth:” [1 Cor. 8:1] not that he meant to inveigh against a true knowledge of God, for in that case he would have accused himself; but, because he knew that some, puffed up by the pretence of knowledge, fall away from the love of God, and imagine that they themselves are perfect, for this reason that they set forth an imperfect Creator, with the view of putting an end to the pride which they feel on account of knowledge of this kind, he says, “Knowledge puffeth up, but love edifieth.” Now there can be no greater conceit than this, that any one should imagine he is better and more perfect than He who made and fashioned him, and imparted to him the breath of life, and commanded this very thing into existence. It is therefore better, as I have said, that one should have no knowledge whatever of any one reason why a single thing in creation has been made, but should believe in God, and continue in His love, than that, puffed up through knowledge of this kind, he should fall away from that love which is the life of man; and that he should search after no other knowledge except [the knowledge of] Jesus Christ the Son of God, who was crucified for us, than that by subtle questions and hair-splitting expressions he should fall into impiety.

2. For how would it be, if any one, gradually elated by attempts of the kind referred to, should, because the Lord said that “even the hairs of your head are all numbered,” set about inquiring into the number of hairs on each one’s head, and endeavour to search out the reason on account of which one man has so many, and another so many, since all have not an equal number, but many thousands upon thousands are to be found with still varying numbers, on this account that some have larger and others smaller heads, some have bushy heads of hair, others thin, and others scarcely any hair at all, - and then those who imagine that they have discovered the number of the hairs, should endeavour to apply that for the commendation of their own sect which they have conceived? Or again, if any one should, because of this expression which occurs in the Gospel, “Are not two sparrows sold for a farthing? and not one of them falls to the ground without the will of your Father,” take occasion to reckon up the number of sparrows caught daily, whether over all the world or in some particular district, and to make inquiry as to the reason of so many having been captured yesterday, so many the day before, and so many again on this day, and should then join on the number of sparrows to his [particular] hypothesis, would he not in that case mislead himself altogether, and drive into absolute insanity those that agreed with him, since men are always eager in such matters to be thought to have discovered something more extraordinary than their masters?

3. But if any one should ask us whether every number of all the things which have been made, and which are made, is known to God, and whether every one of these [numbers] has, according to His providence, received that special amount which it contains; and on our agreeing that such is the case, and acknowledging that not one of the things which have been, or are, or shall be made, escapes the knowledge of God, but that through His providence every one of them has obtained its nature, and rank, and number, and special quantity, and that nothing whatever either has been or is produced in vain or accidentally, but with exceeding suitability [to the purpose intended], and in the exercise of transcendent knowledge, and that it was an admirable and truly divine intellect which could both distinguish and bring forth the proper causes of such a system: if, [I say,] any one, on obtaining our adherence and consent to this, should proceed to reckon up the sand and pebbles of the earth, yea also the waves of the sea and the stars of heaven, and should endeavour to think out the causes of the number which he imagines himself to have discovered, would not his labour be in vain, and would not such a man be justly declared mad, and destitute of reason, by all possessed of common sense? And the more he occupied himself beyond others in questions of this kind, and the more he imagines himself to find out beyond others, styling them unskilful, ignorant, and animal beings, because they do not enter into his so useless labour, the more is he [in reality] insane, foolish, struck as it were with a thunderbolt, since indeed he does in no one point own himself inferior to God; but, by the knowledge which he imagines himself to have discovered, he changes God Himself, and exalts his own opinion above the greatness of the Creator.

Proper mode of interpreting parables and obscure passages of Scripture.

1. A sound mind, and one which does not expose its possessor to danger, and is devoted to piety and the love of truth, will eagerly meditate upon those things which God has placed within the power of mankind, and has subjected to our knowledge, and will make advancement in [acquaintance with] them, rendering the knowledge of them easy to him by means of daily study. These things are such as fall [plainly] under our observation, and are clearly and unambiguously in express terms set forth in the Sacred Scriptures. And therefore the parables ought not to be adapted to ambiguous expressions. For, if this be not done, both he who explains them will do so without danger, and the parables will receive a like interpretation from all, and the body of truth remains entire, with a harmonious adaptation of its members, and without any collision [of its several parts]. But to apply expressions which are not clear or evident to interpretations of the parables, such as every one discovers for himself as inclination leads him, [is absurd.] For in this way no one will possess the rule of truth; but in accordance with the number of persons who explain the parables will be found the various systems of truth, in mutual opposition to each other, and setting forth antagonistic doctrines, like the questions current among the Gentile philosophers.

2. According to this course of procedure, therefore, man would always be inquiring but never finding, because he has rejected the very method of discovery. And when the Bridegroom comes, he who has his lamp untrimmed, and not burning with the brightness of a steady light, is classed among those who obscure the interpretations of the parables, forsaking Him who by His plain announcements freely imparts gifts to all who come to Him, and is excluded from His marriage-chamber. Since, therefore, the entire Scriptures, the prophets, and the Gospels, can be clearly, unambiguously, and harmoniously understood by all, although all do not believe them; and since they proclaim that one only God, to the exclusion of all others, formed all things by His word, whether visible or invisible, heavenly or earthly, in the water or under the earth, as I have shown from the very words of Scripture; and since the very system of creation to which we belong testifies, by what falls under our notice, that one Being made and governs it, - those persons will seem truly foolish who blind their eyes to such a clear demonstration, and will not behold the light of the announcement [made to them]; but they put fetters upon themselves, and every one of them imagines, by means of their obscure interpretations of the parables, that he has found out a God of his own. For that there is nothing whatever openly, expressly, and without controversy said in any part of Scripture respecting the Father conceived of by those who hold a contrary opinion, they themselves testify, when they maintain that the Saviour privately taught these same things not to all, but to certain only of His disciples who could comprehend them, and who understood what was intended by Him through means of arguments, enigmas, and parables. They come, [in fine,] to this, that they maintain there is one Being who is proclaimed as God, and another as Father, He who is set forth as such through means of parables and enigmas.

3. But since parables admit of many interpretations, what lover of truth will not acknowledge, that for them to assert God is to be searched out from these, while they desert what is certain, indubitable, and true, is the part of men who eagerly throw themselves into danger, and act as if destitute of reason? And is not such a course of conduct not to build one’s house upon a rock which is firm, strong, and placed in an open position, but upon the shifting sand? Hence the overthrow of such a building is a matter of ease.

Perfect knowledge cannot be attained in the present life: many questions must be submissively left in the hands of God.

1. Having therefore the truth itself as our rule and the testimony concerning God set clearly before us, we ought not, by running after numerous and diverse answers to questions, to cast away the firm and true knowledge of God. But it is much more suitable that we, directing our inquiries after this fashion, should exercise ourselves in the investigation of the mystery and administration of the living God, and should increase in the love of Him who has done, and still does, so great things for us; but never should fall from the belief by which it is most clearly proclaimed that this Being alone is truly God and Father, who both formed this world, fashioned man, and bestowed the faculty of increase on His own creation, and called him upwards from lesser things to those greater ones which are in His own presence, just as He brings an infant which has been conceived in the womb into the light of the sun, and lays up wheat in the barn after He has given it full strength on the stalk. But it is one and the same Creator who both fashioned the womb and created the sun; and one and the same Lord who both reared the stalk of corn, increased and multiplied the wheat, and prepared the barn.

2. If, however, we cannot discover explanations of all those things in Scripture which are made the subject of investigation, yet let us not on that account seek after any other God besides Him who really exists. For this is the very greatest impiety. We should leave things of that nature to God who created us, being most properly assured that the Scriptures are indeed perfect, since they were spoken by the Word of God and His Spirit; but we, inasmuch as we are inferior to, and later in existence than, the Word of God and His Spirit, are on that very account destitute of the knowledge of His mysteries. And there is no cause for wonder if this is the case with us as respects things spiritual and heavenly, and such as require to be made known to us by revelation, since many even of those things which lie at our very feet (I mean such as belong to this world, which we handle, and see, and are in close contact with) transcend our knowledge, so that even these we must leave to God. For it is fitting that He should excel all [in knowledge]. For how stands the case, for instance, if we endeavour to explain the cause of the rising of the Nile? We may say a great deal, plausible or otherwise, on the subject; but what is true, sure, and incontrovertible regarding it, belongs only to God. Then, again, the dwelling-place of birds - of those, I mean, which come to us in spring, but fly away again on the approach of autumn - though it is a matter connected with this world, escapes our knowledge. What explanation, again, can we give of the flow and ebb of the ocean, although every one admits there must be a certain cause [for these phenomena]? Or what can we say as to the nature of those things which lie beyond it? What, moreover, can we say as to the formation of rain, lightning, thunder, gatherings of clouds, vapours, the bursting forth of winds, and such like things; or tell as to the storehouses of snow, hail, and other like things? [What do we know respecting] the conditions requisite for the preparation of clouds, or what is the real nature of the vapours in the sky? What as to the reason why the moon waxes and wanes, or what as to the cause of the difference of nature among various waters, metals, stones, and such like things? On all these points we may indeed say a great deal while we search into their causes, but God alone who made them can declare the truth regarding them.

3. If, therefore, even with respect to creation, there are some things [the knowledge of] which belongs only to God, and others which come within the range of our own knowledge, what ground is there for complaint, if, in regard to those things which we investigate in the Scriptures (which are throughout spiritual), we are able by the grace of God to explain some of them, while we must leave others in the hands of God, and that not only in the present world, but also in that which is to come, so that God should for ever teach, and man should for ever learn the things taught him by God? As the apostle has said on this point, that, when other things have been done away, then these three, “faith, hope, and charity, shall endure.” For faith, which has respect to our Master, endures unchangeably, assuring us that there is but one true God, and that we should truly love Him for ever, seeing that He alone is our Father; while we hope ever to be receiving more and more from God, and to learn from Him, because He is good, and possesses boundless riches, a kingdom without end, and instruction that can never be exhausted. If, therefore, according to the rule which I have stated, we leave some questions in the hands of God, we shall both preserve our faith uninjured, and shall continue without danger; and all Scripture, which has been given to us by God, shall be found by us perfectly consistent; and the parables shall harmonize with those passages which are perfectly plain; and those statements the meaning of which is clear, shall serve to explain the parables; and through the many diversified utterances [of Scripture] there shall be heard one harmonious melody in us, praising in hymns that God who created all things. If, for instance, any one asks, “What was God doing before He made the world?” we reply that the answer to such a question lies with God Himself. For that this world was formed perfect by God, receiving a beginning in time, the Scriptures teach us; but no Scripture reveals to us what God was employed about before this event. The answer therefore to that question remains with God, and it is not proper for us to aim at bringing forward foolish, rash, and blasphemous suppositions [in reply to it]; so, as by one’s imagining that he has discovered the origin of matter, he should in reality set aside God Himself who made all things.

4. For consider, all ye who invent such opinions, since the Father Himself is alone called God, who has a real existence, but whom ye style the Demiurge; since, moreover, the Scriptures acknowledge Him alone as God; and yet again, since the Lord confesses Him alone as His own Father, and knows no other, as I shall show from His very words, - when ye style this very Being the fruit of defect, and the offspring of ignorance, and describe Him as being ignorant of those things which are above Him, with the various other allegations which you make regarding Him, - consider the terrible blasphemy [ye are thus guilty of] against Him who truly is God. Ye seem to affirm gravely and honestly enough that ye believe in God; but then, as ye are utterly unable to reveal any other God, ye declare this very Being in whom ye profess to believe, the fruit of defect and the offspring of ignorance. Now this blindness and foolish talking flow to you from the fact that ye reserve nothing for God, but ye wish to proclaim the nativity and production both of God Himself, of His Ennoea, of His Logos, and Life, and Christ; and ye form the idea of these from no other than a mere human experience; not understanding, as I said before, that it is possible, in the case of man, who is a compound being, to speak in this way of the mind of man and the thought of man; and to say that thought (ennoea) springs from mind (sensus), intention (enthymesis) again from thought, and word (logos) from intention (but which logos? for there is among the Greeks one logos which is the principle that thinks, and another which is the instrument by means of which thought is expressed); and [to say] that a man sometimes is at rest and silent, while at other times he speaks and is active. But since God is all mind, all reason, all active spirit, all light, and always exists one and the same, as it is both beneficial for us to think of God, and as we learn regarding Him from the Scriptures, such feelings and divisions [of operation] cannot fittingly be ascribed to Him. For our tongue, as being carnal, is not sufficient to minister to the rapidity of the human mind, inasmuch as that is of a spiritual nature, for which reason our word is restrained within us, and is not at once expressed as it has been conceived by the mind, but is uttered by successive efforts, just as the tongue is able to serve it.

5. But God being all Mind, and all Logos, both speaks exactly what He thinks, and thinks exactly what He speaks. For His thought is Logos, and Logos is Mind, and Mind comprehending all things is the Father Himself. He, therefore, who speaks of the mind of God, and ascribes to it a special origin of its own, declares Him a compound Being, as if God were one thing, and the original Mind another. So, again, with respect to Logos, when one attributes to him the third place of production from the Father; on which supposition he is ignorant of His greatness; and thus Logos has been far separated from God. As for the prophet, he declares respecting Him, “Who shall describe His generation?” But ye pretend to set forth His generation from the Father, and ye transfer the production of the word of men which takes place by means of a tongue to the Word of God, and thus are righteously exposed by your own selves as knowing neither things human nor divine.

6. But, beyond reason inflated [with your own wisdom], ye presumptuously maintain that ye are acquainted with the unspeakable mysteries of God; while even the Lord, the very Son of God, allowed that the Father alone knows the very day and hour of judgment, when He plainly declares, “But of that day and that hour knoweth no man, neither the Son, but the Father only.” If, then, the Son was not ashamed to ascribe the knowledge of that day to the Father only, but declared what was true regarding the matter, neither let us be ashamed to reserve for God those greater questions which may occur to us. For no man is superior to his master. If any one, therefore, says to us, “How then was the Son produced by the Father?” we reply to him, that no man understands that production, or generation, or calling, or revelation, or by whatever name one may describe His generation, which is in fact altogether indescribable. Neither Valentinus, nor Marcion, nor Saturninus, nor Basilides, nor angels, nor archangels, nor principalities, nor powers [possess this knowledge], but the Father only who begat, and the Son who was begotten. Since therefore His generation is unspeakable, those who strive to set forth generations and productions cannot be in their right mind, inasmuch as they undertake to describe things which are indescribable. For that a word is uttered at the bidding of thought and mind, all men indeed well understand. Those, therefore, who have excogitated [the theory of] emissions have not discovered anything great, or revealed any abstruse mystery, when they have simply transferred what all understand to the only-begotten Word of God; and while they style Him unspeakable and unnameable, they nevertheless set forth the production and formation of His first generation, as if they themselves had assisted at His birth, thus assimilating Him to the word of mankind formed by emissions.

7. But we shall not be wrong if we affirm the same thing also concerning the substance of matter, that God produced it. For we have learned from the Scriptures that God holds the supremacy over all things. But whence or in what way He produced it, neither has Scripture anywhere declared; nor does it become us to conjecture, so as, in accordance with our own opinions, to form endless conjectures concerning God, but we should leave such knowledge in the hands of God Himself. In like manner, also, we must leave the cause why, while all things were made by God, certain of His creatures sinned and revolted from a state of submission to God, and others, indeed the great majority, persevered, and do still persevere, in [willing] subjection to Him who formed them, and also of what nature those are who sinned, and of what nature those who persevere, - [we must, I say, leave the cause of these things] to God and His Word, to whom alone He said, “Sit at my right hand, until I make Thine enemies Thy footstool.” But as for us, we still dwell upon the earth, and have not yet sat down upon His throne. For although the Spirit of the Saviour that is in Him “searcheth all things, even the deep things of God,” yet as to us “there are diversities of gifts, differences of administrations, and diversities of operations;” and we, while upon the earth, as Paul also declares, “know in part, and prophesy in part.” Since, therefore, we know but in part, we ought to leave all sorts of [difficult] questions in the hands of Him who in some measure, [and that only,] bestows grace on us. That eternal fire, [for instance,] is prepared for sinners, both the Lord has plainly declared, and the rest of the Scriptures demonstrate. And that God foreknew that this would happen, the Scriptures do in like manner demonstrate, since He prepared eternal fire from the beginning for those who were [afterwards] to transgress [His commandments]; but the cause itself of the nature of such transgressors neither has any Scripture informed us, nor has an apostle told us, nor has the Lord taught us. It becomes us, therefore, to leave the knowledge of this matter to God, even as the Lord does of the day and hour [of judgment], and not to rush to such an extreme of danger, that we will leave nothing in the hands of God, even though we have received only a measure of grace [from Him in this world]. But when we investigate points which are above us, and with respect to which we cannot reach satisfaction, [it is absurd] that we should display such an extreme of presumption as to lay open God, and things which are not yet discovered, as if already we had found out, by the vain talk about emissions, God Himself, the Creator of all things, and to assert that He derived His substance from apostasy and ignorance, so as to frame an impious hypothesis in opposition to God.

8. Moreover, they possess no proof of their system, which has but recently been invented by them, sometimes resting upon certain numbers, sometimes on syllables, and sometimes, again, on names; and there are occasions, too, when, by means of those letters which are contained in letters, by parables not properly interpreted, or by certain [baseless] conjectures, they strive to establish that fabulous account which they have devised. For if any one should inquire the reason why the Father, who has fellowship with the Son in all things, has been declared by the Lord alone to know the hour and the day [of judgment], he will find at present no more suitable, or becoming, or safe reason than this (since, indeed, the Lord is the only true Master), that we may learn through Him that the Father is above all things. For “the Father,” says He, “is greater than I.” The Father, therefore, has been declared by our Lord to excel with respect to knowledge; for this reason, that we, too, as long as we are connected with the scheme of things in this world, should leave perfect knowledge, and such questions [as have been mentioned], to God, and should not by any chance, while we seek to investigate the sublime nature of the Father, fall into the danger of starting the question whether there is another God above God.

9. But if any lover of strife contradict what I have said, and also what the apostle affirms, that “we know in part, and prophesy in part,” and imagine that he has acquired not a partial, but a universal, knowledge of all that exists, - being such an one as Valentinus, or Ptolemæus, or Basilides, or any other of those who maintain that they have searched out the deep things of God, - let him not (arraying himself in vainglory) boast that he has acquired greater knowledge than others with respect to those things which are invisible, or cannot be placed under our observation; but let him, by making diligent inquiry, and obtaining information from the Father, tell us the reasons (which we know not) of those things which are in this world, - as, for instance, the number of hairs on his own head, and the sparrows which are captured day by day, and such other points with which we are not previously acquainted, - so that we may credit him also with respect to more important points. But if those who are perfect do not yet understand the very things in their hands, and at their feet, and before their eyes, and on the earth, and especially the rule followed with respect to the hairs of their head, how can we believe them regarding things spiritual, and super-celestial, and those which, with a vain confidence, they assert to be above God? So much, then, I have said concerning numbers, and names, and syllables, and questions respecting such things as are above our comprehension, and concerning their improper expositions of the parables: [I add no more on these points,] since thou thyself mayest enlarge upon them.

Exerpt from The Anti-Nicene Fathers, Vol. I, Irenaeus, "Against Heresies," Ch. XXV - XXVIII

"Thus did the apostles simply, and without respect of persons, deliver to all what they had themselves learned from the Lord."

“But that Paul taught with simplicity what he knew, not only to those who were [employed] with him, but to those that heard him, he does himself make manifest. For when the bishops and presbyters who came from Ephesus and the other cities adjoining had assembled in Miletus, since he was himself hastening to Jerusalem to observe Pentecost, after testifying many things to them, and declaring what must happen to him at Jerusalem, he added: “I know that ye shall see my face no more. Therefore I take you to record this day, that I am pure from the blood of all. For I have not shunned to declare unto you all the counsel of God. Take heed, therefore, both to yourselves, and to all the flock over which the Holy Ghost has placed you as bishops, to rule the Church of the Lord, which He has acquired for Himself through His own blood.” Then, referring to the evil teachers who should arise, he said: “I know that after my departure shall grievous wolves come to you, not sparing the flock. Also of your own selves shall men arise, speaking perverse things, to draw away disciples after them.” “I have not shunned,” he says, “to declare unto you all the counsel of God.” Thus did the apostles simply, and without respect of persons, deliver to all what they had themselves learned from the Lord. Thus also does Luke, without respect of persons, deliver to us what he had learned from them, as he has himself testified, saying, “Even as they delivered them unto us, who from the beginning were eye-witnesses and ministers of the Word.”

Now if any man set Luke aside, as one who did not know the truth, he will, [by so acting,] manifestly reject that Gospel of which he claims to be a disciple. … It follows then, as of course, that these men must either receive the rest of his narrative, or else reject these parts also. For no persons of common sense can permit them to receive some things recounted by Luke as being true, and to set others aside, as if he had not known the truth. … If, on the other hand, they feel compelled to receive the remaining portions also, then, by studying the perfect Gospel, and the doctrine of the apostles, they will find it necessary to repent, that they may be saved from the danger [to which they are exposed].

… But again, we allege the same against those who do not recognise Paul as an apostle: that they should either reject the other words of the Gospel which we have come to know through Luke alone, and not make use of them; or else, if they do receive all these, they must necessarily admit also that testimony concerning Paul, when he (Luke) tells us that the Lord spoke at first to him from heaven: “Saul, Saul, why persecutest thou Me? I am Jesus Christ, whom thou persecutest;” and then to Ananias, saying regarding him: “Go thy way; for he is a chosen vessel unto Me, to bear My name among the Gentiles, and kings, and the children of Israel. For I will show him, from this time, how great things he must suffer for My name’s sake.” Those, therefore, who do not accept of him [as a teacher], who was chosen by God for this purpose, that he might boldly bear His name, as being sent to the forementioned nations, do despise the election of God, and separate themselves from the company of the apostles. For neither can they contend that Paul was no apostle, when he was chosen for this purpose; nor can they prove Luke guilty of falsehood, when he proclaims the truth to us with all diligence. It may be, indeed, that it was with this view that God set forth very many Gospel truths, through Luke’s instrumentality, which all should esteem it necessary to use, in order that all persons, following his subsequent testimony, which treats upon the acts and the doctrine of the apostles, and holding the unadulterated rule of truth, may be saved. His testimony, therefore, is true, and the doctrine of the apostles is open and stedfast, holding nothing in reserve; nor did they teach one set of doctrines in private, and another in public.

For this is the subterfuge of false persons, evil seducers, and hypocrites …”

Exerpt from Ante-Nicene Fathers, Vol I, Irenaeus, Against Heresies, Book III, Chapt XIV-XV