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Beyond poverty, beyond the point that the material needs are reasonably satisfied, only from within is peace.
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The work I have done has, already, been adequately rewarded and recognized. Imagination reaches out repeatedly trying to achieve some higher level of understanding, until suddenly I find myself momentarily alone before one new corner of nature's pattern of beauty and true majesty revealed. That was my reward.
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It is necessary for the very existence of science that minds exist which do not allow that nature must satisfy some preconceived conditions.
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A poet once said, "The whole universe is in a glass of wine." We will probably never know in what sense he meant that, for poets do not write to be understood... How vivid is the claret, pressing its existence into the consciousness that watches it! If our small minds, for some convenience, divide this glass of wine, this universe, into parts - physics, biology, geology, astronomy, psychology, and so on - remember that nature does not know it! So let us put it all back together, not forgetting ultimately what it is for. Let it give us one more final pleasure: drink it and forget it all!
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What I cannot create, I do not understand.
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I would rather have questions that can't be answered than answers that can't be questioned.
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We need to teach how doubt is not to be feared but welcomed. It's OK to say, "I don't know."
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I'm going to play with physics, whenever I want to, without worrying about any importance whatsoever.
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Do not read so much, look about you and think of what you see there.
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All we know so far is what doesn't work.
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If we want to solve a problem that we have never solved before, we must leave the door to the unknown ajar.
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A scientist is never certain. ... We absolutely must leave room for doubt or there is no progress and there is no learning.
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Science is a way of trying not to fool yourself.
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You can recognize truth by its beauty and simplicity. When you get it right, it is obvious that it is right -- at least if you have any experience -- because usually what happens is that more comes out than goes in.
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Learn what the rest of the world is like. The variety is worthwhile.
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In its efforts to learn as much as possible about nature, modern physics has found that certain things can never be "known" with certainty. Much of our knowledge must always remain uncertain. The most we can know is in terms of probabilities.
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Know your place in the world and evaluate yourself fairly, not in terms of the naïve ideals of your own youth, nor in terms of what you erroneously imagine your teacher's ideals are.
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There is no harm in doubt and skepticism, for it is through these that new discoveries are made.
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I don't believe I can really do without teaching. The reason is, I have to have something so that when I don't have any ideas and I'm not getting anywhere, I can say to myself, "At least I'm living; at least I'm doing something. I'm making some contribution." It's just psychological.
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The unanswerable mysteries... the attitude that all is uncertain... to summarize it - the humility of the intellect.
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There is no learning without having to pose a question. And a question requires doubt.
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Work as hard and as much as you want to on the things you like to do the best.
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People who wish to analyze nature without using mathematics must settle for a reduced understanding.
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One does not, by knowing all the physical laws as we know them today, immediately obtain an understanding of anything much. I love only nature, and I hate mathematicians.