"I don't know" - the most important thing to be able to say

Sir John Houghton is a physicist considered to be one of the world's experts in global warming. He was Professor in Atmospheric Physics at Oxford University. He has won a number of awards including Gold Medal of the Royal Astronomical Society. He is also a Christian. Have a listen to this interview with PBS's Bill Moyers on the program Faith & Reason where he discusses his views on science and faith. He concludes with the assertion that one of the most important things a believer needs to be prepared to say is, 'I don't know'.