1 When all the seed shall have come to perfection, they state that then their mother Achamoth shall pass from the intermediate place, and enter in within the Pleroma, and shall receive as her spouse the Saviour, who sprang from all the Æons, that thus a conjunction may be formed between the Saviour and Sophia, that is, Achamoth. These, then, are the bridegroom and bride, while the nuptial chamber is the full extent of the Pleroma. The spiritual seed, again, being divested of their animal souls, and becoming intelligent spirits, shall in an irresistible and invisible manner enter in within the Pleroma, and be bestowed as brides on those angels who wait upon the Saviour.
The Demiurge himself will pass into the place of his mother Sophia; that is, the intermediate habitation. In this intermediate place, also, shall the souls of the righteous repose; but nothing of an animal nature shall find admittance to the Pleroma. When these things have taken place as described, then shall that fire which lies hidden in the world blaze forth and burn; and while destroying all matter, shall also be extinguished along with it, and have no further existence. They affirm that the Demiurge was acquainted with none of these things before the advent of the Saviour.
Source: Adversus haereses (New Advent)