Love is the only sane and satisfactory answer to the problem of human existence.

While every human being has a capacity for love, its realization is one of the most difficult achievements.

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

Only in being productively active can man make sense of his life.

In times of change, learners inherit the earth

We are all equal in the sense that no man must mean - must be - the means for the purposes of another man; but each individual is an end in itself.

Society must be organized in such a way that mans social, loving nature is not separated from his social existence, but becomes one with it.