Dissent is the native activity of the scientist, and it has got him into a good deal of trouble in the last years. But if that is cut off, what is left will not be a scientist. And I doubt whether it will be a man.
Jacob Bronowski

Should I perchance still feel after my death, I would no longer have any doubt, but I would most certainly give the lie to anyone asserting before me that I was dead.
Giacomo Casanova

If the word gets out, if the perception exists that by speaking to a CBS journalist you are, therefore, inevitably, immediately speaking to the police, I don't think there's any doubt but that people won't talk. And, therefore, the public won't learn.
Floyd Abrams

Metaphysical thinking will always no doubt be a strong element in her mentality, and it is to be hoped that she will never lose her great, her sovereign powers in that direction.
Sri Aurobindo

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

Any truth is better than indefinite doubt.
Arthur Conan Doyle

When in doubt or danger, run in circles, scream and shout.
Laurence J. Peter

Believe those who are seeking the truth. Doubt those who find it.
Andre Gide

I have never been in doubt since I was old enough to think intelligently that I would someday be made president.
William McKinley

If Placebo was a drug, they would no doubt be pure heroin - dangerous, mysterious and totally addictive.
Brian Molko

Isn't it the moment of most profound doubt that gives birth to new certainties? Perhaps hopelessness is the very soil that nourishes human hope; perhaps one could never find sense in life without first experiencing its absurdity.
Vaclav Havel

Without a doubt, at the center of the New Testament there stands the Cross, which receives its interpretation from the Resurrection.
Hans Urs von Balthasar

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

If in doubt, move decisions up to the President.
Donald Rumsfeld

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

No fine work can be done without concentration and self-sacrifice and toil and doubt.
Max Beerbohm

An intellectual is going to have doubts, for example, about a fundamentalist religious doctrine that admits no doubt, about an imposed political system that allows no doubt, about a perfect aesthetic that has no room for doubt.
Antonio Tabucchi

I don't have any doubts either about the Universal Declaration of Human Rights. Perhaps some more should be added to the list, but I don't have the slightest doubt about human rights.
Antonio Tabucchi

It's the job of intellectuals and writers to cast doubt on perfection.
Antonio Tabucchi

Doubt is part of all religion. All the religious thinkers were doubters.
Isaac Bashevis Singer