The last of human freedoms - the ability to chose one's attitude in a given set of circumstances.

If you could kick the person in the pants responsible for most of your trouble, you wouldn't sit for a month.

Do it again on the next verse, and people think you meant it.

If everything isn't black and white, I say, 'Why the hell not?'

He who never made a mistake, never made a discovery.

All battles are fought by scared men who'd rather be some place else.

As long as we believe in absurdities we shall continue to commit atrocities.

We can't become what we need to be by remaining what we are.

He alone, who owns the youth, gains the future.

All men are prepared to accomplish the incredible if their ideals are threatened.

Be that self which one truly is.

I'm not a genius. I'm just a tremendous bundle of experience.

Everything is vague to a degree you do not realize till you have tried to make it precise.

A scientist in his laboratory is not a mere technician: he is also a child confronting natural phenomena that impress him as though they were fairy tales.?

It is a good rule in life never to apologize. The right sort of people do not want apologies, and the wrong sort take a mean advantage of them.

I can see in your eyes, I can see in your faces, I can see you cry. But what I want to say, there's no reason to cry. Do not, in the name of peace, go in the streets and riot.

A good liar must have a good memory.

By desiring little, a poor man makes himself rich.

Reverence does not die with mortals, nor does it perish whether they live or die.

With me poetry has not been a purpose, but a passion.

Computers are useless. They can only give you answers.