I learned about it from watching The Silent Revolution, then about a year later I watched And Did They Listen, then I had to really dig into it and read the Talmud but there's a lot of information on that. If you want to read something really unbelievable check out this Sutra:

http://www2.kenyon.edu/Depts/Religion/Fac/Adler/Reln260/Vimalakirti.htm