However difficult life may seem, there is always something you can do and succeed at.

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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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There is no unique picture of reality.

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

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

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I am just a child who has never grown up. I still keep asking these 'how' and 'why' questions. Occasionally, I find an answer.

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

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