Henri Poincare
Mathematician
1854-04-29
Quotes by Henri Poincare
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To doubt everything, or, to believe everything, are two equally convenient solutions; both dispense with the necessity of reflection.
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Science is built up of facts, as a house is with stones. But a collection of facts is no more a science than a heap of stones is a house.
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If one looks at the different problems of the integral calculus which arise naturally when one wishes to go deep into the different parts of physics, it is impossible not to be struck by the analogies existing.
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The scientist does not study nature because it is useful; he studies it because he delights in it, and he delights in it because it is beautiful.
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If we knew exactly the laws of nature and the situation of the universe at the initial moment, we could predict exactly the situation of the same universe at a succeeding moment.
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If that enabled us to predict the succeeding situation with the same approximation, that is all we require, and we should say that the phenomenon had been predicted, that it is governed by the laws.
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Thus, they are free to replace some objects by others so long as the relations remain unchanged.
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It is the harmony of the diverse parts, their symmetry, their happy balance; in a word it is all that introduces order, all that gives unity, that permits us to see clearly and to comprehend at once both the ensemble and the details.
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If nature were not beautiful, it would not be worth knowing, and if nature were not worth knowing, life would not be worth living.
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Science is built of facts the way a house is built of bricks; but an accumulation of facts is no more science than a pile of bricks is a house.
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Science is built of facts the way a house is built of bricks; but an accumulation of facts is nor more science than a pile of bricks is a house.
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