I'm not going to doubt my life.
Yoko Ono

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

I love to doubt as well as know.
Dante Alighieri

Toyota was the first to put a commercial fuel cell powered car on the road, and I have no doubt that Toyota will continue to be in the front lines in the development of competitive fuel cell vehicles.
Maurice Strong

The relationship between commitment and doubt is by no means an antagonistic one. Commitment is healthiest when it's not without doubt but in spite of doubt.
Rollo May

One can't doubt that the American objective in Iraq has failed - different plans have to be made. And the kernel here is the acknowledgement of defeat.
William F. Buckley, Jr.

In the past, it was easier to believe in my own effectiveness. If I worked hard, with good colleagues and good ideas, we could make a difference. But now, I sincerely doubt that.
Margaret J. Wheatley

And new Philosophy calls all in doubt, the element of fire is quite put out; the Sun is lost, and the earth, and no mans wit can well direct him where to look for it.
John Donne

Jack Benny was, without a doubt, the bravest comedian I have ever seen work. He wasn't afraid of silence. He would take as long as it took to tell the story.
Bob Newhart

I want to state upfront, unequivocally and without doubt: I do not believe that any racial, ethnic or gender group has an advantage in sound judging. I do believe that every person has an equal opportunity to be a good and wise judge, regardless of their background or life experiences.
Sonia Sotomayor

When a man is in doubt about this or that in his writing, it will often guide him if he asks himself how it will tell a hundred years hence.
Samuel Butler

The dead should be judged like criminals, impartially, but they should be allowed the benefit of the doubt.
Samuel Butler

After having dispatched a meal, I went ashore, and found no habitation save a single house, and that without an occupant; we had no doubt that the people had fled in terror at our approach, as the house was completely furnished.
Christopher Columbus

Being in love was like China: you knew it was there, and no doubt it was very interesting, and some people went there, but I never would. I'd spend all my life without ever going to China, but it wouldn't matter, because there was all the rest of the world to visit.
Philip Pullman

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

He was thinking alone, and seriously racking his brain to find a direction for this single force four times multiplied, with which he did not doubt, as with the lever for which Archimedes sought, they should succeed in moving the world, when some one tapped gently at his door.
Alexandre Dumas

Gold and silver are no doubt subject to fluctuations, from the discovery of new and more abundant mines; but such discoveries are rare, and their effects, though powerful, are limited to periods of comparatively short duration.
David Ricardo

The danger is not lest the soul should doubt whether there is any bread, but lest, by a lie, it should persuade itself that it is not hungry.
Simone Weil

I don't think there's any artist of any value who doesn't doubt what they're doing.
Francis Ford Coppola

Yes, I will bring the understanding of a woman to the Court, but I doubt that alone will affect my decisions.
Sandra Day O'Connor