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

“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.”

“He doubted her. You must never doubt the one you love.But they might not be telling the truth.Never mind that. You tell them the truth.What do you mean?You can't be another person's honesty, child, but you can be your own.So what should I say?When?When I love someone?You should say it.”

“Our greatest challenge today...is to couple conviction with doubt. By conviction, I mean some pragmatically developed faith, trust, or centeredness; and by doubt I mean openness to the ongoing changeability, mystery, and fallibility of the conviction.”

“You've got to say what you mean and mean what you say...Doubt in your voice is an open door people will shove right through.”

“Progress is born of doubt and inquiry. The Church never doubts, never inquires. To doubt is heresy, to inquire is to admit that you do not know—the Church does neither.”