Expulsion and genocide, though both are international offenses, must remain distinct; the former is an offense against fellow-nations, whereas the latter is an attack upon human diversity as such, that is, upon a characteristic of the "human status" without which the very words "mankind" or "humanity" would be devoid of meaning.

Every end in history necessarily contains a new beginning.

There is a strange interdependence between thoughtlessness and evil.

There are no dangerous thoughts; thinking itself is dangerous.

Philosophy is called upon to compensate for the frustrations of politics and, more generally, of life itself.

Exasperation with the threefold frustration of action -- the unpredictability of its outcome, the irreversibility of the process, and the anonymity of its authors -- is almost as old as recorded history. It has always been a great temptation, for men of action no less than for men of thought, to find a substitute for action in the hope that the realm of human affairs may escape the haphazardness and moral irresponsibility inherent in a plurality of agents.

To be sure, nothing is more important to the integrity of the universities . . . than a rigorously enforced divorce from war-oriented research and all connected enterprises.