Irenaeus: Against Heresies, Books I–V

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 ^[1] ] that we should display such an extreme of presumption as to lay open God, and things which are not yet discovered, ^[2] 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.” ^[3] 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. ^[4]

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,” ^[5] 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 ^[6] 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, ^[7] 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.