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

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What I meant by 'we would know the mind of God' is, we would know everything that God would know, if there were a God. Which there isn't. I'm an atheist.

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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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You can’t get to a time before the Big Bang because there was no time before the Big Bang. We have finally found something that doesn’t have a cause, because there was no time for a cause to exist in.

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The more you learn, the more you know. The more you know, the more you forget. The more you forget, the less you know. So why bother to learn.

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When something is made idiot proof, they will just make better idiots.

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Intelligence is the ability to adapt to change.

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Nothing cannot exist forever.

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I have experimental evidence that time travel is not possible.

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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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