If what we regard as real depends on our theory, how can we make reality the basis of our philosophy? But we cannot distinguish what is real about the universe without a theory. It makes no sense to ask if it corresponds to reality, because we do not know what reality is independent of a theory.

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The huge questions of existence still remain unanswered—how did life begin on Earth? What is consciousness? Is there anyone out there or are we alone in the universe? These are questions for the next generation to work on.

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The thing about smart people is that they seem like crazy people to dumb people.

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Keeping an active mind has been vital to my survival, as has been maintaining a sense of humor.

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Scientific discovery may not be better than sex, but the satisfaction lasts longer.

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Equations are just the boring part of mathematics. I attempt to see things in terms of geometry.

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Love the neighbor. But don't get caught.

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The idea that we are alone in the universe seems to me completely implausible and arrogant, considering the number of planets and stars that we know exist, it's extremely unlikely that we are the only form of evolved life.

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What I meant by 'we would know the mind of God' is, we would know everything that God would know, if there were a God. Which there isn't. I'm an atheist.

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How difficult life may seem, while there’s life, there is hope.

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