I came across some files tonight I hadn't heard before: Billy Graham's 1962 lecture at Harvard University on "Evangelism and the Intellectual" (Part 1, Part 2).
For those of us whose only image of Dr. Graham is of an older man speaking slowly in a stadium while giving the simple gospel message, it's quite interesting to listen to the 43-year-old evangelist quoting contemporary psychologists and playrights and philosophers as he seeks to explain sin, atonement, conversion, and meaning to an audience of skeptics.