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

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The twentieth century saw man's view of the universe transformed: we realized the insignificance of our planet in the vastness of the universe, and we discovered that time and space we curved and inseparable , that the universe was expanding, and that it had a beginning in time.

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The basic assumption of science is scientific determinism.

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What I have learned from life is to make the most of what you have got.

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It is my view that the simplest explanation is there is no God. No one created the universe and no one directs our fate. This leads me to a profound realization. There is probably no heaven, and no afterlife either. We have this one life to appreciate the grand design of the universe, and for that, I am extremely grateful.

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

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

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[If] there were such a God, I would like to ask however did he think of anything as complicated as M-theory in eleven dimensions.

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