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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It is very important for young people keep their sense of wonder and keep asking why.

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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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We are in danger of destroying ourselves by our greed and stupidity. We cannot remain looking inwards at ourselves on a small and increasingly polluted and overcrowded planet.

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

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The wise never marry, and when they marry they become otherwise.

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I'm happy if I have added something to our understanding of the universe.

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I have noticed even people who claim everything is predestined, and that we can do nothing to change it, look before they cross the road.

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

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This means that at earlier times objects would have been closer together. In fact, it seemed that there was a time, about ten or twenty thousand million years ago, when they were all at exactly the same place and when, therefore, the density of the universe was infinite.

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