A million million years gives us some time to prepare for the end . . . let us make the best of it.

The good life is one inspired by love and guided by knowledge.

The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts.

The time you enjoy wasting is not wasted time.

Fear is the main source of superstition, and one of the main sources of cruelty. To conquer fear is the beginning of wisdom.

Men are born ignorant, not stupid. They are made stupid by education.

An Honest politician will not be tolerated by a democracy unless he is very stupid ... because only a very stupid man can honestly share the prejudices of more than half the nation.

If there were in the world today any large number of people who desired their own happiness more than they desired the unhappiness of others, we could have a paradise in a few years.

We have in fact, two kinds of morality, side by side: one which we preach, but do not practice, and another which we practice, but seldom preach.

The fact that an opinion has been widely held is no evidence whatever that it is not utterly absurd.

Cruel men believe in a cruel god and use their belief to excuse their cruelty. Only kindly men believe in a kindly god, and they would be kindly in any case.

Gone are the days when success depends on how you use your muscle tissues. In this 21st century, your brain cells must work more than your muscle tissues!

Watch my sword, not my face!'he said. 'I'm going to stab you, not bite you!

My most frequent admonition to athletes and coaches is: train, do not strain.

To get greater than 100% return on a growth step, give up defensiveness. Defensiveness stifles performance, and destroys relationships.

There is always a period when a man with a beard shaves it off. This period does not last. He returns headlong to his beard.

Some artists want to confront. Some want to invoke thought. They're all necessary and they're all valid.

I have written occasionally on links between my scientific work and political thinking, but not much, because the links seem to me abstract and speculative.

Take sips of this pure wine being poured. Don't mind that you've been given a dirty cup.

It's hard to invent a new thing, and it's just as hard to invent another new thing.

Writing studio movies is the best job in the world... it's awesome.