Henri Poincaré

The scientist must be a man of humility, for he must recognize the limits of his knowledge.

The universe is not a chaos, but an order.

The true scientist is not afraid to be wrong.

The most important thing in education is not to teach facts, but to teach how to think.

The mathematical method is not only a method of proof, but also a method of discovery.

The only way to make progress is to question everything.

The scientist must be a man of passion, for he must love his work.

The universe is not a collection of isolated facts, but a coherent whole.

The true scientist is not afraid to be alone.

The most important thing in life is not to succeed, but to strive.

The mathematical imagination is not a faculty of seeing, but a faculty of inventing.

The only way to understand the future is to create it.

The scientist must be a man of hope, for he must believe in the possibility of progress.

The most beautiful theories are those which are the most general.

Logic sometimes makes monsters. For thirty years, all thinking Europe has been doing is escaping from them. For me, I am content to be a man.

A scientist worthy of the name, above all a mathematician, experiences in his work the same impression as an artist; his pleasure is as great and of the same nature.

The aim of science is not things themselves, but the relations between things; outside these relations there is no reality knowable.

If there were no objective reality, there would be no science.

What is a good definition? It is one that can be used to prove theorems.

We must not forget that the aim of mathematics is not to calculate, but to understand.