“Doubt thou the stars are fire;Doubt that the sun doth move;Doubt truth to be a liar;But never doubt I love.”

“It is the presence of doubt and the discovery of truth to answer that doubt that is the key to the whole process. Doubt is the key to spirituality, just as doubt is the key to science.”

“If faith never encounters doubt, if truth never struggles with error, if good never battles evil, how can faith know its own power? In my own pilgrimage, if I had to choose between a faith that has stared doubt in the eye and made it blink, or a naive faith that has never known the firing line of doubt, I will choose the former every time.”

“I doubt my doubt, doubt itself is unsureI love, but who is it for whom I sigh?Not Muslim, yet not heathen; who am I?”

“You doubt because you love truth.”

“I still doubt it will work.""You'd doubt the sun's rising if you weren't proven wrong each day," Raoden said with a smile.”