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.

Is love an art? Then it requires knowledge and effort.

Man always dies before he is fully born.

Faith is not a weak form of belief or knowledge; it is not faith in this or that; faith is the conviction about the not yet proven, the knowledge of the real possibility, the awareness of pregnancy.

I have learnt to appreciate the clarity of English language.

The most important things we talk about on Sundays are things to which we pay very little attention.

The most important factor for the development of the individual is the structure and the values of the society into which he was born.