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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One, remember to look up at the stars and not down at your feet. Two, never give up work. Work gives you meaning and purpose and life is empty without it. Three, if you are lucky enough to find love, remember it is there and don't throw it away.

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I would see the end of physics as we know it, but now I think the wonder of discovery will continue long after I am gone. We are close to some of these answers, but we are not there yet.

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I think the human race has no future if it doesn't go into space.

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I don't fear God- I fear His believers.

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

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So remember to look up at the stars and not down at your feet. Try to make sense of what you see and hold on to that childlike wonder about what makes the universe exist.

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associates and collaborators were Roger Penrose

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Nothing cannot exist forever.

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How do we know that we are not just characters in a computer-generated soap opera?

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