The Gnosis of Light - 'Introduction gives an overview of the Gnostic beliefs. "The Untitled Apocalypse", is translated in this book and has been dated around the 2nd century AD, the time of Basilides and Valentinus. It lays out the early Gnostic teachings in esoteric symbolism designed to work upon the initiate's inner experience rather than being worked upon with the rational mind. Its imagery fosters contemplation intended to prepare a candidate for the Baptism of the Light in which union with the indwelling spark of the divine occurs'.