I believe that one can and must hope for a sane society that furthers man's capacity to love his fellow men, to work and create, to develop his reason and his objectivity of a sense of himself that is based on the experience of his productive energy. I believe that one can and must hope for the collective regaining of a mental health that is characterized by the capacity to love and to create.

Modern man is alienated from himself, from his fellow men, and from nature. He has been transformed into a commodity, experiences his life forces as an investment which must bring him the maximum profit obtainable under existing market conditions.

Whether...a change from the supremacy of natural science to a new social science will take place...depends on one factor: how many brilliant, learned, disciplined, and caring men and women are attracted by the new challenge.

Free man is by necessity insecure, thinking man by necessity uncertain.

There is only one reality: the act of feeling ourselves in the process of making choices.

Optimism is an alienated form of faith, pessimism an alienated form of despair.

A person who has not been completely alienated, who has remained sensitive and able to feel, who has not lost the sense of dignity, who is not yet 'for sale', who can still suffer over the suffering of others, who has not acquired fully the having mode of existence - briefly, a person who has remained a person and not become a thing - cannot help feeling lonely, powerless, isolated in present-day society.