Mathematics is, I believe, the chief source of the belief in eternal and exact truth, as well as a sensible intelligible world.

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.

What are you NOT working on that you should?

Do what you love but do what it takes to do what you love.

It's the steady constant driving to the goal for which you're striving not the speed with which you travel that will make your victory sure.

I am glad to see that a system of labor prevails under which laborers can strike when they want to.

For me, literature is a way of enlarging myself by learning about people who are not like me.

And it is characteristic of man that he alone has any sense of good and evil, of just and unjust, and the like, and the association of living beings who have this sense makes family and a state.

If you want to have a creative culture, you can't get it by reading books. You get it by example.

Religions that teach brotherly love have been used as an excuse for persecution, and our profoundest scientific insight is made into a means of mass destruction.

Revolution is the opium of the intellectuals.

When you've been around a snake long enough, you learn how to crawl in the dirt.