Mathematical science is in my opinion an indivisible whole, an organism whose vitality is conditioned upon the connection of its parts.

Physics is much too hard for physicists.

The arithmetical symbols are written diagrams and the geometrical figures are graphic formulas.

Geometry, like arithmetic, requires for its logical development only a small number of simple, fundamental principles. These fundamental principles are called the axioms of geometry.

One can measure the importance of a scientific work by the number of earlier publications rendered superfluous by it

Some people have got a mental horizon of radius zero and call it their point of view.

If I were to awaken after having slept for a thousand years, my first question would be: Has the Riemann hypothesis been proven?