Sunday Sequence - EVANGELIST BULLIES AND THE POWER OF SPEECH

The Archbishop of Canterbury challenged evangelist "bullies" this week. But when does evangelism cross the line into spiritual abuse? We'll also be looking at some great speeches that changed the world -- or just outraged it. From Martin Luther King to Enoch Powell, we assess the moral power of oratory. And speaking of changing the world: the father of chemistry, Robert Boyle, has certainly left his mark. But a new book by a leading historian of science says we've missed the driving force behind Boyle's law if we fail to understand Boyle as a Christian evangelist.