The Sermon on the Mount is probably one of the best-known speeches of Jesus, and if you've spent any time in a church service, then the odds are that you've heard at least part of it. It contains the beatitudes - "blessed are the meek" - the Lord's Prayer, and a whole host of teachings that are held sacred by Christians the world over. But… did the writer of Matthew fabricate the whole thing? Today, Dr. Bart Ehrman joins me to talk about this amazing sermon, whether anything like it exists elsewhere in the New Testament, and whether Jesus is likely to have uttered a word of it.