If it doesn't work out there will never be any doubt that the pleasure was worth all the pain.
Jimmy Buffett

The prevalence of suicide, without doubt, is a test of height in civilization; it means that the population is winding up its nervous and intellectual system to the utmost point of tension and that sometimes it snaps.
Henry Ellis

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

I think we ought always to entertain our opinions with some measure of doubt. I shouldn't wish people dogmatically to believe any philosophy, not even mine.
Bertrand Russell

Just think of the tragedy of teaching children not to doubt.
Clarence Darrow

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

It takes a big idea to attract the attention of consumers and get them to buy your product. Unless your advertising contains a big idea, it will pass like a ship in the night. I doubt if more than one campaign in a hundred contains a big idea.
David Ogilvy

In love we often doubt what we most believe.
Francois de La Rochefoucauld

When we are in love we often doubt that which we most believe.
Francois de La Rochefoucauld

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

But what of black women?... I most sincerely doubt if any other race of women could have brought its fineness up through so devilish a fire.
W. E. B. Du Bois

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

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

Faith means belief in something concerning which doubt is theoretically possible.
William James

Doubt is not the opposite of faith; it is one element of faith.
Paul Tillich

The courage to be is rooted in the God who appears when God has disappeared in the anxiety of doubt.
Paul Tillich

All pain is either severe or slight, if slight, it is easily endured; if severe, it will without doubt be brief.
Marcus Tullius Cicero

The major parties could conduct live human sacrifices on their podiums during prime time, and I doubt that anybody would notice.
Dave Barry

It is better to remain silent and be thought a fool, than open one's mouth and remove all doubt.
Samuel Johnson