It seems to me a fundamental dishonesty, and a fundamental treachery to intellectual integrity to hold a belief because you think it's useful and not because you think it's true.

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.

Write truthfully, write from the heart, and your words will live.

In the course of history, men come to see that iron necessity is neither iron nor necessary.

A veteran deserves the very best health care anywhere. That means sometimes, they should go out into the private sector if something's being done better than the VA.

This change in the conception of reality is the most profound and the most fruitful that physics has experienced since the time of Newton. Refering to James Clerk Maxwell's contributions to physics.

I'd be a Libertarian, if they weren't all a bunch of tax-dodging professional whiners.

I can assure you, if we pull this off, we'll all be celebrating just like we always do.

I don't know how to speak to celebrities. Every time I talk to Alan Menken, I say something stupid and I have to apologize.

The future of rock belongs to women.

You know, you want everything you do, obviously, to be a success critically and commercially. But what you find out as you go along is that everything won't.

Your success is no longer about your ability to do what you are told, and do it well.