It is far better to foresee even without certainty than not to foresee at all.
– Henri Poincare
To doubt everything or to believe everything are two equally convenient solutions; both dispense with the necessity of reflection.
– Henri Poincare
Science is facts; just as houses are made of stones, so is science made of facts; but a pile of stones is not a house and a collection of facts is not necessarily science.
– Henri Poincare
Thought is only a flash between two long nights, but this flash is everything.
– Henri Poincare
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.
– Henri Poincare
The mind uses its faculty for creativity only when experience forces it to do so.
– Henri Poincare
The mathematical facts worthy of being studied are those which, by their analogy with other facts, are capable of leading us to the knowledge of a physical law.
– Henri Poincare
One would have to have completely forgotten the history of science so as to not remember that the desire to know nature has had the most constant and the happiest influence on the development of mathematics.
– Henri Poincare
It is through science that we prove, but through intuition that we discover.