At the tail end of last weeks posting we began the works of Irenaeus with book one of Against Heresies. So far, much of these works are comprised of Irenaeus explaining the heretical beliefs of various Gnostic groups. He follows up these explanations with correction, instruction and warning to those who are or might be lead astray from the true Gospel of Christ.

Irenaeus – Against Heresies: Book One, Chap. 341-42: Absurd interpretations of the Marcosians

 I well know, my dear friend, that when thou hast read through all this, thou wilt indulge in a hearty laugh over this their inflated wise folly! But those men are really worthy of being mourned over, who promulgate such a kind of religion, and who so frigidly and perversely pull to pieces the greatness of the truly unspeakable power, and the dispensations of God in themselves so striking, by means of Alpha and Beta, and through the aid of numbers. But as many as separate from the Church, and give heed to such old wives’ fables as these, are truly self-condemned; and these men Paul commands us, “after a first and second admonition, to avoid.”And John, the disciple of the Lord, has intensified their condemnation, when he desires us not even to address to them the salutation of “good-speed;” for, says he, “He that bids them be of good-speed is a partaker with their evil deeds;” and that with reason, “for there is no good-speed to the ungodly,” saith the Lord.

Irenaeus – Against Heresies: Book Two, Chap. 1: There is but one God. The following paragraph has a striking similarity to St. Anselm’s famous statement, “God is that, than which nothing greater can be conceived.”

For how can there be any other Fulness, or Principle, or Power, or God, above Him, since it is matter of necessity that God, the Pleroma (Fulness) of all these, should contain all things in His immensity, and should be contained by no one? But if there is anything beyond Him, He is not then the Pleroma of all, nor does He contain all. For that which they declare to be beyond Him will be wanting to the Pleroma, or, [in other words,] to that God who is above all things. But that which is wanting, and falls in any way short, is not the Pleroma of all things. In such a case, He would have both beginning, middle, and end, with respect to those who are beyond Him. And if He has an end in regard to those things which are below, He has also a beginning with respect to those things which are above. In like manner, there is an absolute necessity that He should experience the very same thing at all other points, and should be held in, bounded, and enclosed by those existences that are outside of Him. For that being who is the end downwards, necessarily circumscribes and surrounds him who finds his end in it. And thus, according to them, the Father of all (that is, He whom they call Proön and Proarche), with their Pleroma, and the good God of Marcion, is established and enclosed in some other, and is surrounded from without by another mighty Being, who must of necessity be greater, inasmuch as that which contains is greater than that which is contained. But then that which is greater is also stronger, and in a greater degree Lord; and that which is greater, and stronger, and in a greater degree Lord—must be God.

Irenaeus – Against Heresies: Book Two, Chap. 25 – The following statement is made concerning numerology and when it is proper to make a theological inference to numbers and when it is not.

 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.

Irenaeus – Against Heresies: Book Two, Chap. 26

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:” 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

Irenaeus – Against Heresies: Book Two, Chap. 28 – Here, Irenaeus points out a simple rule of Biblical interpretation that can also apply to the evaluation of religions – we move from the known to the unknown. We move from the generals to the particulars.

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.