Einstein does not remain attached to the classical principles, and when presented with a problem in physics he quickly envisages all of… — Henri Poincare Copy Share Image
All the scientist creates in a fact is the language in which he enunciates it. If he predicts a fact, he will… — Henri Poincare Copy Share Image
This harmony that human intelligence believes it discovers in nature - does it exist apart from that intelligence? No, without doubt, a… — Henri Poincare Copy Share Image
One does not ask whether a scientific theory is true, but only whether it is convenient. — Henri Poincare Copy Share Image
The scientist does not study nature because it is useful to do so. He studies it because he takes pleasure in it,… — Henri Poincare Copy Share Image
A first fact should surprise us, or rather would surprise us if we were not used to it. How does it happen… — Henri Poincare Copy Share Image
Thus, be it understood, to demonstrate a theorem, it is neither necessary nor even advantageous to know what it means. The geometer… — Henri Poincare Copy Share Image
The mathematical facts worthy of being studied are those which, by their analogy with other facts, are capable of leading us to the knowledge… — Henri Poincare Copy Share Image
. . . by natural selection our mind has adapted itself to the conditions of the external world. It has adopted the geometry most… — Henri Poincare Copy Share Image
If we knew exactly the laws of nature and the situation of the universe at the initial moment, we could predict exactly the situation… — Henri Poincare Copy Share Image
Absolute space, that is to say, the mark to which it would be necessary to refer the earth to know whether it really moves,… — Henri Poincare Copy Share Image
Absolute space, that is to say, the mark to which it would be necessary to refer the earth to know whether it really moves,… — Henri Poincare Copy Share Image
A cat is witty, he has nerve, he knows how to do precisely the right thing at the right moment. — Henri Poincare Copy Share Image
In the old days when people invented a new function they had something useful in mind. — Henri Poincare Copy Share Image
Mathematics has a threefold purpose. It must provide an instrument for the study of nature. But this is not all: it has a philosophical… — Henri Poincare Copy Share Image
