From the physical point of view, a man is nothing more than a system of cells, or from the mental point of view, than a system of representations; in either case, he differs only in degree from animals.
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.
To pursue a goal which is by definition unattainable is to condemn oneself to a state of perpetual unhappiness.
It is inadmissible that systems of ideas like religions, which have held so considerable a place in history, and to which, in all times, men have come to receive the energy which they must have to live, should be made up of a tissue of illusions.
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.
Religious phenomena are naturally arranged in two fundamental categories: beliefs and rites. The first are states of opinion, and consist in representations; the second are determined modes of action.
