The armament industry is indeed one of the greatest dangers that beset mankind. It is the hidden evil power.

Never memorize something that you can look up.

Science is the century-old endeavor to bring together by means of systematic thought the perceptible phenomena of this world into as thorough-going an association as possible.

The thinking that got us to where we are is not the thinking that will get us to where we want to be.

Imagination is more important than knowledge. Imagination is the language of the soul. Pay attention to your imagination and you will discover all you need to be fulfilled.

Only in mathematics and physics was I, through self-study, far beyond the school curriculum, and also with regard to philosophy as it was taught in the school curriculum.

The facts, although interesting, are irrelevant.