I can't say I've heard many apologetic talks before, but among those few talks and debates I've heard so far, this is the best.
This video is a little long, just over one hour, so get yourself a drink and get into the mood for intelligent, serious, yet fun (that is, not boring) mental engagement.
It's my pleasure to introduce Tim Keller, who is the pastor at Redeemer Presbyterian Church and the author of The Reason for God.
Watch his talk at Google.
You can get his book, the Reason for God at Koorong or Amazon.
(HT: The Resurgence)