Henri Poincare Quotes - Page 5

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• It may be appropriate to quote a statement of Poincare, who said (partly in jest no doubt) that there must be something mysterious about the normal law since mathematicians think it is a law of nature whereas physicists are convinced that it is a mathematical theorem.

  Henri Poincare

  Science, Thinking, Law

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• I then began to study arithmetical questions without any great apparent result, and without suspecting that they could have the least connexion with my previous researches. Disgusted at my want of success, I went away to spend a few days at the seaside, and thought of entirely different things. One day, as I was walking on the cliff, the idea came to me, again with the same characteristics of conciseness, suddenness, and immediate certainty, that arithmetical transformations of indefinite ternary quadratic forms are identical with those of non-Euclidian geometry.

  Henri Poincare

  Success, Science, Ideas

  Henri Poincare (2012). “The Value of Science: Essential Writings of Henri Poincare”, p.649, Modern Library

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• All the scientist creates in a fact is the language in which he enunciates it. If he predicts a fact, he will employ this language, and for all those who can speak and understand it, his prediction is free from ambiguity. Moreover, this prediction once made, it evidently does not depend upon him whether it is fulfilled or not.

  Henri Poincare

  Freedom, Science, Understanding

  Henri Poincare (2012). “The Value of Science: Essential Writings of Henri Poincare”, p.547, Modern Library

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• All that we can hope from these inspirations, which are the fruits of unconscious work, is to obtain points of departure for such calculations. As for the calculations themselves, they must be made in the second period of conscious work which follows the inspiration, and in which the results of the inspiration are verified and the consequences deduced.‎

  Henri Poincare

  Inspiration, Hard Work, Science

  Henri Poincare (2012). “The Value of Science: Essential Writings of Henri Poincare”, p.660, Modern Library

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• Hypotheses are what we lack the least.

  Henri Poincare

  Hypothesis

  Henri Poincare (2012). “The Value of Science: Essential Writings of Henri Poincare”, p.225, Modern Library

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• But all of my efforts served only to make me better acquainted with the difficulty, which in itself was something.

  Henri Poincare

  Effort, Difficulty

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• Just as houses are made of stones, so is science made of facts.

  Henri Poincare

  House, Stones, Facts

  "Half a Twist on a Cliche Speech" by Adriana Salerno, blogs.ams.org. May 30, 2011.

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• A very small cause, which escapes us, determines a considerable effect which we cannot ignore, and we say that this effect is due to chance.

  Henri Poincare

  Science, Causes, Chance

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• Need we add that mathematicians themselves are not infallible?

  Henri Poincare

  Add, Needs, Mathematician

  Henri Poincare (2012). “The Value of Science: Essential Writings of Henri Poincare”, p.641, Modern Library

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• It is a misfortune for a science to be born too late when the means of observation have become too perfect. That is what is happening at this moment with respect to physical chemistry; the founders are hampered in their general grasp by third and fourth decimal places.

  Henri Poincare

  Mean, Science, Perfect

  Henri Poincare (2012). “The Value of Science: Essential Writings of Henri Poincare”, p.236, Modern Library

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