We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special.

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Estoy convencido de que los humanos necesitamos dejar la Tierra para evitar correr el riesgo de ser aniquilados.

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Work gives you meaning and purpose and life is empty without it.

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We are very, very small, but we are profoundly capable of very, very big things.

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Galileo, perhaps more than any other single person, was responsible for the birth of modern science.

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Nothing is better than reading and gaining more and more knowledge.

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We spend a great deal of time studying history, which, let’s face it, is mostly the history of stupidity. So

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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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Intelligence is the ability to adapt to change.

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I have lived with the prospect of an early death for the last 49 years. I'm not afraid of death, but I'm in no hurry to die. I have so much I want to do first. I regard the brain as a computer which will stop working when its components fail. There is no heaven or afterlife for broken down computers; that is a fairy story for people afraid of the dark.

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