Well known Quote by Lord Chesterfield

“We know accurately only when we know little; doubt grows with knowledge.”

— Johann Wolfgang von Goethe

“In order to determine whether we can know anything with certainty, we first have to doubt everything we know”

— Anonymous

“In the real world it is meaningless to doubt existence; the doubt itself demonstrates the existence of the doubter.”

— Richard Rhodes

“It is only charlatans who are certain. We know nothing of first principles. It is truly extravagant to define God, angels, and minds, and…

— Will Durant

“Expressing doubt is how we begin a journey to discover essential truths.”

— Kilroy J. Oldster

“Doubt can lead you where certainty never will.”

— Todd Lockwood

“Doubt and fear are the great enemies of knowledge, and he who encourages them, who does not slay them, thwarts himself at every step.”

— James Allen

“Knowledge is not determined by what you know, but by whether you believe you can always learn.”

— Bobby Hoffman

“Let us not pretend to doubt in philosophy what we do not doubt in our hearts.”

— Charles Sanders Peirce

“There are plenty of theories to listen to and follow but truth yearns to be discovered. When you find it, there is no doubt…

— E'yen A. Gardner

“To believe with certainty we must begin by doubting.”

— Polish Proverb

“No scientific theory can claim absolutely certainty.”

— David Christian