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.

For [Sigmund ] Freud, the manifest dream, that is that which we remember after waking,is like a code message, that can be interpreted, provided the right key is avail-able, for example the method of free association.

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.

I am convinced that boredom is one of the greatest tortures. If I were to imagine Hell, it would be the place where you were continually bored.

Love is a power which produces love.

Freedom is the fundamental condition for any growth.

Creativity is the ability to see and to respond.