Pistis Sophia - Hardcoverby G. R. S. Mead (Author) Pistis Sophia is a book written by G. R. S. Mead that explores the Gnostic teachings of the early Christian era. The book is based on the ancient text of the same name, which is believed to have been written in the 2nd or 3rd century AD. The text is a dialogue between Jesus and his disciples, in which he reveals hidden knowledge and spiritual practices to help them achieve salvation. The book covers a wide range of topics,