La liberté, c'est le droit de faire tout ce que les lois permettent.
The only way to do great work is to love what you do.
What can be said at all can be said clearly, and what we cannot talk about we must pass over in silence.
The universe is not only stranger than we imagine, it is stranger than we can imagine.
The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.