An introduction to the religio-philosophical system known as Gnosticism. The course will explore both the dualistic principle which underlies Gnosticism (that matter is inherently evil and that the good God is revealed only through esoteric knowledge) and the major Gnostic sects including Valentinianism and Manichaeism. Survey of the Nag Hammadi library discovered in 1945. Discussion of the influence of Gnosticism on Judaism and Christianity.