Integrity simply means a willingness not to violate one's identity, in the many ways in which such violation is possible.

Just as love for one individual which excludes the love for others is not love, love for one's country which is not part of one's love for humanity is not love, but idolatrous worship.

We may know ourselves, and yet even with all the efforts we make, we do not know ourselves. We know our fellowman, and yet we do not know him, because we are not a thing, and our fellowman is not a thing. The further we reach into the depths of our being, on someone else's being, the more the goal of knowledge eludes us.

Even the most sadistic and destructive man is human, as human as the saint.

The real opposition is that between the ego-bound man, whose existence is structured by the principle of having, and the free man, who has overcome his egocentricity.

The task we must set for ourselves is not to feel secure, but to be able to tolerate insecurity.

To die is poignantly bitter, but the idea of having to die without having lived is unbearable.