Now I'm a scientific expert; that means I know nothing about absolutely everything.

The limits of the possible can only be defined by going beyond them into the impossible.

I don't believe in astrology; I'm a Sagittarius and we're skeptical.

The only way to define your limits is by going beyond them.

The greatest tragedy in mankind's entire history may be the hijacking of morality by religion.

The moon is the first milestone on the road to the stars.

I'm sure the universe is full of intelligent life. It's just been too intelligent to come here.

Any sufficiently advanced technology is indistinguishable from magic.

There is hopeful symbolism in the fact that flags do not wave in a vacuum.

Two possibilities exist: either we are alone in the Universe or we are not. Both are equally terrifying.

Until we get rid of religion, we won't be able to conduct the search for God.

The more we practice nonviolence in our words, thoughts and actions the more peaceful will be our inner state.

I think with my right hand.

The only place you're sure to find love is at the end of a letter from your mother.

Writers should be able to fully deduct from their taxes all writing-related expenses, including alcohol, parking tickets, court judgments, fines for lewd public behavior, Zoloft, and cigarettes.

Daoist thought is the root of science and technology in China.

You leave home, you move on and you do the best you can. I got lost in this whole world and forgot who I am.

We will have a border that is open for business, open for tourism, open for legitimate travelers; but that is closed to terrorists and drug pushers and smugglers and others who seek to break the law.

The ancient Greeks, as Plato reports, believed that we discover truth through "reminiscence," that is by "remembering," by intuitively searching into our own experience.

Don't be an actor. Be a human being who works off what exists under imaginary circumstances.