This is too difficult for a mathematician. It takes a philosopher. The hardest thing in the world to understand is the income tax.

The leader is one who, out of the clutter, brings simplicity... out of discord, harmony... and out of difficulty, opportunity.

Do you remember how electrical currents and 'unseen waves' were laughed at? The knowledge about man is still in its infancy.

The aim (of education) must be the training of independently acting and thinking individuals who, however, see in the service to the community their highest life problem.

The rest of my life (as a 39 year old) I want to reflect on what life is.

I am a determinist. As such, I do not believe in free will. The Jews believe in free will. They believe that man shapes his own life. I reject that doctrine philosophically. In that respect I am not a Jew.

The more cruel the wrong that men commit against an individual or a people, the deeper their hatred and contempt for their victim.