3 They teach, however, that the power which proceeded from the woman by ebullition, being besprinkled with light, fell downward from the place occupied by its progenitors, yet possessing by its own will that besprinkling of light; and it they call Sinistra, Prunicus, and Sophia, as well as masculo-feminine. This being, in its simplicity, descended into the waters while they were yet in a state of immobility, and imparted motion to them also, wantonly acting upon them even to their lowest depths, and assumed from them a body.
For they affirm that all things rushed towards and clung to that sprinkling of light, and begin it all round. Unless it had possessed that, it would perhaps have been totally absorbed in, and overwhelmed by, material substance. Being therefore bound down by a body which was composed of matter, and greatly burdened by it, this power regretted the course it had followed, and made an attempt to escape from the waters and ascend to its mother: it could not effect this, however, on account of the weight of the body lying over and around it.
But feeling very ill at ease, it endeavoured at least to conceal that light which came from above, fearing lest it too might be injured by the inferior elements, as had happened to itself. And when it had received power from that besprinkling of light which it possessed, it sprang back again, and was borne aloft; and being on high, it extended itself, covered [a portion of space], and formed this visible heaven out of its body; yet remained under the heaven which it made, as still possessing the form of a watery body. But when it had conceived a desire for the light above, and had received power by all things, it laid down this body, and was freed from it. This body which they speak of that power as having thrown off, they call a female from a female.
Source: Adversus haereses (New Advent)