Henri Poincaré

Science advances one funeral at a time.

The essence of mathematics lies in its freedom.

We must not forget that science is a human enterprise.

The harmony of the world is made manifest in Form and Number.

Intuition is the necessary precondition for the application of logic.

The only real valuable thing is intuition.

In the work of the natural sciences, those who do not know mathematics do not know what they are talking about.

A very small cause, which escapes us, determines a considerable effect which we cannot ignore.

The mathematical method is the only one by which we can arrive at knowledge.

Life is far too important a thing ever to talk seriously about.

The ideas of economists and political philosophers, both when they are right and when they are wrong, are more powerful than is commonly understood.

To be able to say precisely what one means is the greatest of virtues.

The non-Euclidean geometries are just as true as the Euclidean.

Science is not a palace of truth, but a temple of discovery.

My last words? Continue the work.

The secret of genius is to carry the spirit of childhood into maturity.

Fuchsian functions were born in a day.

The study of topology is the study of qualitative properties.

In relativity, time is relative, but effort is absolute.

The beauty of a mathematical theorem depends on its unexpectedness.