You believe, because you have seen me.... Blessed are those that believe, and have not seen!<quoted text>
Great point. The Bible actually does require evidence. Consider this verse.
1 John 4:1
Dear friends, do not believe every spirit, but test the spirits to see whether they are from God, because many false prophets have gone out into the world.
Of course... If you believe in your heart... you will have your proof!
It's funny that way!