To the Master's honor all must turn, each in its track, without a sound, forever tracing Newton's ground.

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

The attempt to combine wisdom and power has only rarely been successful and then only for a short while.

Teaching should be such that what is offered is perceived as a valuable gift and not as hard duty. Never regard study as duty but as the enviable opportunity to learn to know the liberating influence of beauty in the realm of the spirit for your own personal joy and to the profit of the community to which your later work belongs.

It is true that my parents were worried because I began to speak fairly late, so that they even consulted a doctor. I can't say how old I was - but surely not less than three.

Don't wait for miracles, your whole life is a miracle.

Ethical axioms are found and tested not very differently from the axioms of science. Truth is what stands the test of experience.