This is G.R.S. Meads translation of the Pistis Sophia, the most extensive Gnostic scripture available until the discovery of Nag Hammadi texts in 1945.
The Pistis Sopha is a startling blend of primitive Christianity and Hellenic Paganism, with other elements such as reincarnation, Astrology, Mystery religion and Hermetic magic. The Goddess makes an appearance in the guise of Sophia, a fallen angel.