5 It is as if there were two iron tools, or instruments, the one of which was continually in the workman's hands and in constant use, and by the use of which he made whatever he pleased, and displayed his art and skill, but the other of which remained idle and useless, never being called into operation, the workman never appearing to make anything by it, and making no use of it in any of his labours; and then one should maintain that this useless, and idle, and unemployed tool was superior in nature and value to that which the artisan employed in his work, and by means of which he acquired his reputation.
Such a man, if any such were found, would justly be regarded as imbecile, and not in his right mind. And so should those be judged of who speak of themselves as being spiritual and superior, and of the Creator as possessed of an animal nature, and maintain that for this reason they will ascend on high, and penetrate within the Pleroma to their own husbands (for, according to their own statements, they are themselves feminine), but that God [the Creator] is of an inferior nature, and therefore remains in the intermediate place, while all the time they bring forward no proofs of these assertions: for the better man is shown by his works, and all works have been accomplished by the Creator; but they, having nothing worthy of reason to point to as having been produced by themselves, are labouring under the greatest and most incurable madness.
Source: Adversus haereses (New Advent)