Even one well-made observation will be enough in many cases, just as one well-constructed experiment often suffices for the establishment of a law.

Reality seems valueless by comparison with the dreams of fevered imaginations; reality is therefore abandoned.

Although our moral conscience is a part of our consciousness, we do not feel ourselves on an equality with it. In this voice which makes itself heard only to give us orders and establish prohibitions, we cannot recognize our own voices; the very tone in which it speaks to us warns us that it expresses something within us that is not of ourselves.

From top to bottom of the ladder, greed is aroused without knowing where to find ultimate foothold. Nothing can calm it, since its goal is far beyond all it can attain. Reality seems valueless by comparison with the dreams of fevered imaginations; reality is therefore abandoned.

Man is only a moral being because he lives in society, since morality consists in solidarity with the group, and varies according to that solidarity. Cause all social life to vanish, and moral life would vanish at the same time, having no object to cling to.

When morals are sufficient, law is unnecessary; when morals are insufficient, law is unenforceable.

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.