Melancholy suicide. - This is connected with a general state of extreme depression and exaggerated sadness, causing the patient no longer to realize sanely the bonds which connect him with people and things about him. Pleasures no longer attract.

There is no society known where a more or less developed criminality is not found under different forms. No people exists whose morality is not daily infringed upon. We must therefore call crime necessary and declare that it cannot be non-existent, that the fundamental conditions of social organization, as they are understood, logically imply it.

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

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

Man could not live if he were entirely impervious to sadness. Many sorrows can be endured only by being embraced, and the pleasure taken in them naturally has a somewhat melancholy character.

Science cannot describe individuals, but only types. If human societies cannot be classified, they must remain inaccessible to scientific description.

The roles of art, morality, religion, political faith, science itself are not to repair organic exhaustion nor to provide sound functioning of the organs. All this supraphysical life is built and expanded not because of the demands of the cosmic environment but because of the demands of the social environment.