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

The two most far-reaching critical theories at the beginning of the latest phase of industrial society were those of Marx and Freud. Marx showed the moving powers and the conflicts in the social-historical process. Freud aimed at the critical uncovering of the inner conflicts. Both worked for the liberation of man, even though Marx's concept was more comprehensive and less time-bound than Freud's.

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

Greed is a bottomless pit which exhausts the person in an endless effort to satisfy the need without ever reaching satisfaction.

Exclusive love is a contradiction in itself.

Mother's love is peace. It need not be acquired, it need not be deserved.

The history of man so far is nothing to brag about, from the standpoint of our ideas - and what I mean is, that in comparison with most other societies, our present-day American society has achieved things which are remarkable: material wealth, greater than for any other nation; a relative freedom from oppression; a relative mobility; a spreading of art, of music, of thought, which is also rather unique.