All Henri Poincare Quotes
- Consider now the Milky Way. Here also we see an innumerable dust, only the grains of this dust are no longer atoms but stars; these… Act
- Why is it that showers and even storms seem to come by chance, so that many people think it quite natural to pray for rain… Ask
- It is by logic we prove. It is by intuition we discover. Discover
- In one word, to draw the rule from experience, one must generalize; this is a necessity that imposes itself on the most circumspect observer. Circumspect
- 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… Born
- Every phenomenon, however trifling it be, has a cause, and a mind infinitely powerful, and infinitely well-informed concerning the laws of nature could have foreseen… Age
- Tolstoi explains somewhere in his writings why, in his opinion, "Science for Science's sake" is an absurd conception. We cannot know all the facts since… Absurd
- 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… Any
- It is often said that experiments should be made without preconceived ideas. That is impossible. Not only would it make every experiment fruitless, but even… All
- Mathematicians do not study objects, but relations between objects. Inspirational
- What is it indeed that gives us the feeling of elegance in a solution, in a demonstration? Demonstration
- It is far better to foresee even without certainty than not to foresee at all. All
- When the logician has resolved each demonstration into a host of elementary operations, all of them correct, he will not yet be in possession of… All
- How is it that there are so many minds that are incapable of understanding mathematics? ... the skeleton of our understanding, ... and actually they… All
- So is not mathematical analysis then not just a vain game of the mind? To the physicist it can only give a convenient language; but… All
- For a long time the objects that mathematicians dealt with were mostly ill-defined; one believed one knew them, but one represented them with the senses… Believed
- The aim of science is not things themselves, as the dogmatists in their simplicity imagine, but the relation between things. Aim
- 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,… All
- Experiment is the sole source of truth. It alone can teach us something new; it alone can give us certainty. Alone
- Geometry is not true, it is advantageous. Advantageous