Anti-Semitism is nothing but the antagonistic attitude produced in the non-Jew by the Jewish group. This is a normal social reaction. The Jewish group has thrived on oppression and on the antagonism it has forever met in the world... the root cause is their use of enemies they create in order to keep solidarity.

I never think of the future. It comes soon enough. When visiting the U.S. from Germany for a winter academic stay.

Fantasie is belangrijker dan kennis, want kennis is begrensd.

I cannot imagine a God who rewards and punishes the objects of his creation and is but a reflection of human frailty.

I have not eaten enough of the tree of knowledge, though in my profession I am obligated to feed on it regularly.

The ideals which have always shone before me and filled me with the joy of living are goodness, beauty, and truth. To make a goal of comfort or happiness has never appealed to me; a system of ethics built on this basis would be sufficient only for a herd of cattle.

You must be aware that most men (and also not only a few women) are by nature not monogamous. This nature makes itself even more forceful when tradition and circumstance stand in an individual's way.