The future is of greater interest to me than the past, since that is where I intend to spend the rest of my life.

The history of scientific and technical discovery teaches us that the human race is poor in independent and creative imagination.

Physics is essentially an intuitive and concrete science. Mathematics is only a means for expressing the laws that govern phenomena.

In my opinion there is no other salvation for civilization and even for the human race than the creation of a world government with security on the basis of law. As long as there are sovereign states with their separate armaments and armament secrets, new world wars cannot be avoided.

Discussion and argument are essential parts of science; the greatest talent is the ability to strip a theory until the simple basic idea emerges with clarity.

Time and space are modes by which we think and not conditions in which we live.

Reason is intuition's servant.