2 Alas for the honour of vainglory which at once passes away, and no longer appears! There will be some Æon, in whose case such honour will not be thought at all to have had an existence, and then the things which are above will be unhonoured; or it will be necessary to produce once more another Mother weeping, and in despair, in order to the honour of the Pleroma. What a dissimilar, and at the same time blasphemous image! Do you tell me that an image of the Only-begotten was produced by the former of the world, whom again you wish to be considered the Nous (mind) of the Father of all, and [yet maintain] that this image was ignorant of itself, ignorant of creation,— ignorant, too, of the Mother,— ignorant of everything that exists, and of those things which were made by it; and are you not ashamed while, in opposition to yourselves, you ascribe ignorance even to the Only-begotten Himself?
For if these things [below] were made by the Saviour after the similitude of those which are above, while He (the Demiurge) who was made after such similitude was in so great ignorance, it necessarily follows that around Him, and in accordance with Him, after whose likeness he that is thus ignorant was formed, ignorance of the kind in question spiritually exists. For it is not possible, since both were produced spiritually, and neither fashioned nor composed, that in some the likeness was preserved, while in others the likeness of the image was spoiled, that image which was here produced that it might be according to the image of that production which is above.
But if it is not similar, the charge will then attach to the Saviour, who produced a dissimilar image—of being, so to speak, an incompetent workman. For it is out of their power to affirm that the Saviour had not the faculty of production, since they style Him All Things. If, then, the image is dissimilar, he is a poor workman, and the blame lies, according to their hypothesis, with the Saviour. If, on the other hand, it is similar, then the same ignorance will be found to exist in the Nous (mind) of their Propator, that is, in the Only-begotten.
The Nous of the Father, in that case, was ignorant of Himself; ignorant, too, of the Father; ignorant, moreover, of those very things which were formed by Him. But if He has knowledge, it necessarily follows also that he who was formed after his likeness by the Saviour should know the things which are like; and thus, according to their own principles, their monstrous blasphemy is overthrown.
Source: Adversus haereses (New Advent)