“How prone to doubt, how cautious are the wise!”

“When we are struggling against overwhelming odds, when we are pitting ourselves against the combined might of state apparatus and military power, we are sometimes subject to doubts — usually the doubts of those whose belief in the permanence of an existing order is absolute. It is amazing how many people still remain convinced that it is wise to accept the status quo.”

“We wish we could show you the world as it sleeps. Then you'd never have any doubt about how similar, how trusting, how astounding and vulnerable we all are.”

“There can be no doubt that the Virgin Mary is in heaven. How it happened we do not know.”

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

“Wise men, when in doubt whether to speak or to keep quiet, give themselves the benefit of the doubt, and remain silent.”

“It's hard to say how long he'll be out but he's 100 per cent doubtful for the weekend, that's for sure.”

“Without somehow destroying me in the process, how could God reveal himself in a way that would leave no room for doubt? If there were no room for doubt, there would be no room for me.”

“We must doubt the certainty of everything which passes through the senses, but how much more ought we to doubt things contrary to the senses, such as the existence of God and the soul.”

“Poverty and Genius were coupled by the wisdom of Providence for wise and good ends, no doubt”