James 1:6 (NIV) But when he asks, he must believe and not doubt, because he who doubts is like a wave of the sea, blown and tossed by the wind.
Romans 14:23 (NIV) But the man who has doubts is condemned if he eats, because his eating is not from faith; and everything that does not come from faith is sin.
Jude 1:22 (NIV) Be merciful to those who doubt.
Matthew 14:31 (NIV) Immediately Jesus reached out his hand and caught him. "You of little faith," he said, "why did you doubt?"
Matthew 21:21-22 (NIV) 21 Jesus replied, "I tell you the truth, if you have faith and do not doubt, not only can you do what was done to the fig tree, but also you can say to this mountain, 'Go, throw yourself into the sea,' and it will be done. 22 If you believe, you will receive whatever you ask for in prayer."
Doubt is the disease of this inquisitive, restless age. It is the price we pay for our advanced intelligence and civilization—the dim night of our resplendent day. But as the most beautiful light is born of darkness, so the faith that springs from conflict is often the strongest and the best. Billy Graham (1918- ) Draper's Book of Quotations for the Christian World.