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
It is through science that we prove, but through intuition that we discover. – 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
The mind uses its faculty for creativity only when experience forces it to do so. – Henri Poincare