Almost all the other fellows do not look from the facts to the theory but from the theory to the facts; they cannot get out of the network of already accepted concepts; instead, comically, they only wriggle about inside.

The moon does not simply disappear when we are not looking at it.

The world needs heroes and it's better they be harmless men like me than villains like Hitler

Growth comes through analogy; through seeing how things connect, rather than only seeing how they might be different.

By academic freedom I understand the right to search for truth and to publish and teach what one holds to be true. This right also implies a duty: one must not conceal any part of what one has recognized to be true.

Those who have an interest in keeping the machinery of war going will stop at nothing to make public opinion subservient to their murderous ends.

I live in that solitude which is painful in youth, but delicious in the years of maturity.