I no doubt deserved my enemies, but I don't believe I deserved my friends.
Walt Whitman

Without doubt, machinery has greatly increased the number of well-to-do idlers.
Karl Marx

When prayer removes distrust and doubt and enters the field of mental certainty, it becomes faith; and the universe is built on faith.
Ernest Holmes

Doubt is not a pleasant condition, but certainty is absurd.
Voltaire

Great leaders are almost always great simplifiers, who can cut through argument, debate and doubt, to offer a solution everybody can understand.
Colin Powell

I respect faith, but doubt is what gives you an education.
Wilson Mizner

If the Sun and Moon should ever doubt, they'd immediately go out.
William Blake

I have no doubt but that the misery of the lower classes will be found to abate whenever the Government assumes a freer aspect and the laws favor a subdivision of Property.
James Madison

And I have no doubt that every new example will succeed, as every past one has done, in showing that religion and Government will both exist in greater purity, the less they are mixed together.
James Madison

To walk through the ruined cities of Germany is to feel an actual doubt about the continuity of civilization.
George Orwell

I doubt whether classical education ever has been or can be successfully carried out without corporal punishment.
George Orwell

Today the theory of evolution is about as much open to doubt as the theory that the earth goes round the sun.
Richard Dawkins

When in doubt, do it.
Oliver Wendell Holmes

There is something pagan in me that I cannot shake off. In short, I deny nothing, but doubt everything.
Lord Byron

There's naught, no doubt, so much the spirit calms as rum and true religion.
Lord Byron

There lives more faith in honest doubt, believe me, than in half the creeds.
Alfred Lord Tennyson

Never doubt that a small group of thoughtful, committed citizens can change the world; indeed, it's the only thing that ever has.
Margaret Mead

Doubt grows with knowledge.
Johann Wolfgang von Goethe

We know accurately only when we know little, with knowledge doubt increases.
Johann Wolfgang von Goethe

For diplomacy to be effective, words must be credible - and no one can now doubt the word of America.
George W. Bush