6 Moreover, to meditate how to search into [the nature of] the perfect Father, and to have a desire to exist within Him, and to have a comprehension of His [greatness], could not entail the stain of ignorance or passion, and that upon a spiritual Æon; but would rather [give rise to] perfection, and impassibility, and truth. For they do not say that even they, though they be but men, by meditating on Him who was before them—and while now, as it were, comprehending the perfect, and being placed within the knowledge of Him, — are thus involved in a passion of perplexity, but rather attain to the knowledge and apprehension of truth.
For they affirm that the Saviour said, “Seek, and you shall find,” to His disciples with this view, that they should seek after Him who, by means of imagination, has been conceived of by them as being above the Maker of all— the ineffable Bythus; and they desire themselves to be regarded as “the perfect;” because they have sought and found the perfect One, while they are still on earth. Yet they declare that that Æon who was within the Pleroma, a wholly spiritual being, by seeking after the Propator, and endeavouring to find a place within His greatness, and desiring to have a comprehension of the truth of the Father, fell down into [the endurance of] passion, and such a passion that, unless she had met with that Power who upholds all things, she would have been dissolved into the general substance [of the Æons], and thus come to an end of her [personal] existence.
Source: Adversus haereses (New Advent)