What is it that distinguishes man from animals? It is not his upright posture.

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.

Sleep is often the only occasion in which man cannot silence his conscience; we forget what we knew in our dream.

Ger-mans love the ambiguous word, verbal assonances as ends in themselves,vague concepts. Anglosaxons are more clear.

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

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

I understand by socialism a society in which the aim of production is not profit, but the use. In which the individual citizen participates responsibly in his work, and in the whole social organization, and in which he is not a means who is employed by capital.