Without a doubt, Dr. John Lennox's talk at Harvard remains one of my favorites; I have blogged about it before as well as other talks of his. It's very much worthwhile to listen to the talk in its entirety and to the Q&A session at the end wherein he relates a couple of unique experiences of divine guidance as a postscript (he was asked a question) to his more intellectual address. I post the talk again for those who might not know of John Lennox.