“If you don't have doubts you're either kidding yourself or asleep. Doubts are the ants in the pants of faith. They keep it awake and moving.”

“Don't dig up in doubt what you planted in faith.”

“Thinking of you keeps me awake. Dreaming of you keeps me asleep. Being with you keeps me alive.”

“I think there's blame on both sides, you look at, you look at both sides, I think there's blame on both side, and I have no doubt about it, and you don't have any doubt about it either.”

“If you can keep your head when all about you
Are losing theirs and blaming it on you,
If you can trust yourself when all men doubt you,
But make allowance for their doubting too;!”

“Laugh at yourself, but don't ever aim your doubt at yourself. Be bold. When you embark for strange places, don't leave any of yourself safely on shore. Have the nerve to go into unexplored territory.”

“Certainly you will have doubts. There will be questionings and faith will return again. That is how faith is established.”

“Doctor, you don't know what it is to doubt everything, even yourself. No, you don't; you couldn't with eyebrows like yours.”

“If you're ever in doubt, throw a pepper in the air. If it fails to come down, you have gone mad, so don't trust in anything.”

“Faith doesn't mean you never doubt. It only means you never act upon your doubts.”