Man is the only animal for whom his own existence is a problem which he has to solve.

Just as modern mass production requires the standardization of commodities, so the social process requires standardization of man, and this standardization is called equality.

The danger of the past was that men became slaves. The danger of the future is that men may become robots. True enough, robots do not rebel. But given man's nature, robots cannot live and remain sane, they become ''Golems,'' they will destroy their world and themselves because they cannot stand any longer the boredom of a meaningless life.

Just as love is an orientation which refers to all objects and is incompatible with the restriction to one object, so is reason a human faculty which must embrace the whole of the world with which man is confronted.

Man always dies before he is fully born.

In the nineteenth century the problem was that God is dead. In the twentieth century the problem is that man is dead.

The most beautiful as well as the most ugly inclinations of man are not part of a fixed biologically given human nature, but result from the social process which creates man.

There is no meaning to life except the meaning man gives his life by the unfolding of his powers.

The quest for certainty blocks the search for meaning. Uncertainty is the very condition to impel man to unfold his powers.