A monomaniac is a sick person whose mentality is perfectly healthy in all respects but one; he has a single flaw, clearly localized. At times, for example, he has an unreasonable and absurd desire to drink or steal or use abusive language; but all his other acts and all his other thoughts are strictly correct.

What history teaches us is that man does not change arbitrarily; he does not transform himself at will on hearing the voices of inspired prophets. The reason is that all change, in colliding with the inherited institutions of the past, is inevitably hard and laborious; consequently it only takes place in response to the demands of necessity. For change to be brought about it is not enough that it should be seen as desirable; it must be the product of changes within the whole network of diverse casual relationships which then determine the situation of man.

The first and most basic rule is to consider social facts as things.

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

That men have an interest in knowing the world which surrounds them, and consequently that their reflection should have been applied to it at an early date, is something that everyone will readily admit.

Man is a moral being, only because he lives in society. Let all social life disappear and morality will disappear with it.

A society whose members are united by the fact that they think in the same way in regard to the sacred world and its relations with the profane world, and by the fact that they translate these common ideas into common practices, is what is called a Church. In all history, we do not find a single religion without a Church.