Quotes By Henri Poincare

If nature were not beautiful, it would not be worth knowing, and if nature were not worth knowing, life would not be worth living.

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.

To doubt everything, or, to believe everything, are two equally convenient solutions; both dispense with the necessity of reflection.

No more than these machines need the mathematician know what he does.

A very small cause which escapes our notice determines a considerable effect that we cannot fail to see, and then we say that the effect is due to chance.

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

It is far better to foresee even without certainty than not to foresee at all.

The mind uses its faculty for creativity only when experience forces it to do so.

Invention consists in avoiding the constructing of useless contraptions and in constructing the useful combinations which are in infinite minority.