When mores are sufficient, laws are unnecessary. When mores are insufficient, laws are unenforceable.

Socialism is not a science, a sociology in miniature: it is a cry of pain.

It is science, and not religion, which has taught men that things are complex and difficult to understand.

Each victim of suicide gives his act a personal stamp which expresses his temperament, the special conditions in which he is involved, and which, consequently, cannot be explained by the social and general causes of the phenomenon.

Our whole social environment seems to us to be filled with forces which really exist only in our own minds.

If one class of society is obliged, in order to live, to take any price for its services, while another can abstain from such action thanks to resources at its disposal which, however, are not necessarily due to any social superiority, the second has an unjust advantage over the first at law. In other words, there cannot be rich and poor a birth without there being unjust contracts.

Too cheerful a morality is a loose morality; it is appropriate only to decadent peoples and is found only among them.