Doubt, it seems to me, is the central condition of a human being in the twentieth century.

If in doubt, don't. If still in doubt, do what's right.

If in doubt, move decisions up to the President.

Squabbling in public will eventually ruin football; there's no doubt it's hurting us already. Polls taken by Louis Harris - polls as valid as any political polls - indicate that very clearly.

The ideal, without doubt, varies, but its enemies, alas, are always the same.

I cannot doubt that women will line up, like the men elected, with the groups whose political thinking and convictions are in accord with their own political convictions.

Jealousy lives upon doubts. It becomes madness or ceases entirely as soon as we pass from doubt to certainty.

When we are in love we often doubt that which we most believe.

In love we often doubt what we most believe.

There is no doubt that someone who tries to throw a curve or pitch at any early age before he's developed, before his hand is big enough to grip the ball correctly, will damage his arm.

It's a technical, fairly difficult job that has no particular political connotations, so I doubt there are any big campaign contributors dying to be on the Fed. And remember, it doesn't pay very well, certainly by Republican standards.

Cocteau is someone who has made such a profound impression on me that there's no doubt he's influenced every one of my films.

There's no doubt that it's still a dangerous place, Afghanistan. The fortunate thing is that the United States was helping to provide security for Chairman Karzai. And it shows that the United States is committed to that regime.

I'm definitely more influenced by European writers than I am by American writers, there's no doubt about that.

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.