To live in the hearts of others is to never die in those we leave behind.

We are, each of us, a multitude. Within us is a little universe.

Don't judge everyone else by your own limited experience.

The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

The notion that science and spirituality are somehow mutually exclusive does a disservice to both.

Science is a way of thinking much more than it is a body of knowledge.

Where we have strong emotions, we're liable to fool ourselves.

Human beings have a demonstrated talent for self-deception when their emotions are stirred.

The cure for a fallacious argument is a better argument, not the suppression of ideas.

we make our world significant by the courage of our questions and the depth of our answers.

The dumbing down of America is evident in the slow decay of substantive content, a kind of celebration of ignorance.

Better the hard truth, I say, than the comforting fantasy.

I don't want to believe. I want to know.

The absence of evidence is not the evidence of absence.

Even through your hardest days, remember we are all made of stardust.

Be grateful every day for the brief but magnificent opportunity that life provides.

Imagination will often carry us to worlds that never were. But without it, we go nowhere.

If we continue to accumulate only power and not wisdom, we will surely destroy ourselves.

Nothing disturbs me more than the glorification of stupidity.