Quantum mechanics is certainly imposing. But an inner voice tells me that this is not yet the real thing. The theory says a lot, but does not bring us any closer to the secrets of the "Old One." I, at any rate, am convinced that He is not playing at dice.

If you are out to describe the truth, leave elegance to the tailor.

Man's will, sustained by an indominable conviction, is much more powerful than material forces that seem insurmountable.

My pacifism is an instinctive feeling, a feeling that possesses me because the murder of men is disgusting. My attitude is not derived from any intellectual theory but is based on my deepest antipathy to every kind of cruelty and hatred.

I know that the most joy in my life has come to me from my violin.

All our thinking is of this nature, a free play with concepts.

Every reminiscence is colored by the way things are today, and therefore by a delusive point of view.