Fr. Seraphim Rose gave a notable lecture at the University of Santa Cruz in 1981, just a year before he reposed, to a class which was a survey of world religions. Several people found this lecture (alongside another that was given) to be life changing for them. Amidst the spiritual smorgasboard that was UC Santa Cruz, Fr. Seraphim stood out. The lecture which is now available in streaming form, is preceded by an introduction by Fr. Damascene Christiansen, and the lecture is read by a member of the St. Herman Brotherhood for the first several minutes (this part of the lecture wasn't taped). Then the audio switches, and you can hear the rest of the lecture as given by Fr. Seraphim.
Listen here: