Nationalism, on my opinion, is nothing more than an idealistic rationalization for militarism and aggression.

A theory is something nobody believes, except the person who made it. An experiment is something everybody believes, except the person who made it.

It takes a different kind of thinking to solve a problem than the kind of thinking which produced the problem.

The significant problems we have cannot be solved at the same level of thinking with which we created them.

Out of clutter, find simplicity.

Politics is for the present, but an equation is for eternity.

Imagination is everything. It is the preview of life's coming attractions.