Why are you not a Christian?
My favorite part @ 0:18 - 3:25
Q: Do you think there's a practical reason for having a religious belief ?
A: Well there can't be a practical reason for believing what isn't true! … Either a thing is true or it isn't. If it is true you should believe it, and if it isn't you shouldn't. And if you can't find out whether it's true or whether isn't you should suspend judgment.
It seems to me a fundamental dishonesty and a fundamental treachery to intellectual integrity to hold a belief because you think it's useful and not because you think it's true.