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

Any truth is better than indefinite doubt.
Arthur Conan Doyle

One must always hope when one is desperate, and doubt when one hopes.
Gustave Flaubert

The deplorable mania of doubt exhausts me. I doubt about everything, even my doubts.
Gustave Flaubert

I doubt if a single individual could be found from the whole of mankind free from some form of insanity. The only difference is one of degree. A man who sees a gourd and takes it for his wife is called insane because this happens to very few people.
Desiderius Erasmus

Doubt, the essential preliminary of all improvement and discovery, must accompany the stages of man's onward progress. The faculty of doubting and questioning, without which those of comparison and judgment would be useless, is itself a divine prerogative of the reason.
Albert Pike

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

The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when it be obeyed.
Nathaniel Hawthorne

I slept with faith and found a corpse in my arms on awakening; I drank and danced all night with doubt and found her a virgin in the morning.
Aleister Crowley

The first test of a truly great man is his humility. By humility I don't mean doubt of his powers or hesitation in speaking his opinion, but merely an understanding of the relationship of what he can say and what he can do.
John Ruskin

Nearly all the powerful people of this age are unbelievers, the best of them in doubt and misery, the most in plodding hesitation, doing as well as they can, what practical work lies at hand.
John Ruskin

I think Picasso was, without doubt, the greatest portraitist of the 20th century, if not any other century.
David Hockney

We have enslaved the rest of the animal creation, and have treated our distant cousins in fur and feathers so badly that beyond doubt, if they were able to formulate a religion, they would depict the Devil in human form.
William Ralph Inge

When in doubt, have a man come through the door with a gun in his hand.
Raymond Chandler

Pain was something we were expected to endure. But I doubt very much if you would be entirely happy today if a doctor threw a towel in your face and jumped on you with a knife.
Roald Dahl

I realize now that I was a feminist and the minute I heard the word I certainly knew it meant me, but at that time I don't think we had the label yet. But there's no doubt about it that I was born a feminist.
Marlo Thomas

If you don't know what to do with many of the papers piled on your desk, stick a dozen colleagues initials on them and pass them along. When in doubt, route.
Malcolm Forbes

The road to perseverance lies by doubt.
Francis Quarles

When in doubt, go for the dick joke.
Robin Williams

There are individuals who have never done anything for Jesus Christ, and I have no doubt there are preachers as well, who have never done anything for the God Almighty.
Billy Sunday