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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Unfortunately, however, these two theories are known to be inconsistent with each other—they cannot both be correct.

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Look up at the stars, not down at your feet.

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I used to think information was destroyed in black hole. This was my biggest blunder, or at least my biggest blunder in science.

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One can't prove that God doesn't exist. But science makes God unnecessary. The laws of physics can explain the universe without the need for a creator.

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

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The idea that we are alone in the universe seems to me completely implausible and arrogant, considering the number of planets and stars that we know exist, it's extremely unlikely that we are the only form of evolved life.

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

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

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It is no good getting furious if you get stuck. What I do is keep thinking about the problem but work on something else. Sometimes it is years before I see the way forward. In the case of information loss and black holes, it was 29 years.

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