I originally constructed this web site primarily for the benefit of the students in my classes at San Francisco State University, from which I am now retired. (I am currently a research professor at the Institute for World Religions in Berkeley, California.) I am leaving the site online in the hope that people will still find it to be useful. All of the material is copyrighted. Permission is granted for individual, single copy, personal use only. Please send suggestions, corrections, broken links, and inquiries about other use of the materials to me at epstein@sfsu.edu.