The less diseased are the conducting media, the centres of nutrition, perception and volition, so much the weaker naturally will the ego-mania be, and so much the more harmlessly will it be manifested. Its least objectionable expression is the comic importance which the ego-maniac often attributes to his sensations, inclinations and activities. Is he a painter? he has no doubt that the whole history of the universe only hinges on painting, and on his pictures in particular. Is he a writer of prose or verse? he is convinced that humanity has no other care, or at least no more serious care, than for verses and books. Let it not be objected that this is not peculiar to ego-maniacs, but is the case with the vast majority of mankind. Assuredly everyone thinks what he is doing is important, and that man would not be worth much who performed his work so heedlessly and so superficially, with so little pleasure and conscientiousness, that he himself could not look upon it with respect. But the great difference between the rational and sane man and the ego-maniac is, that the former sees clearly how subordinate his occupation is to the rest of humanity, although it fills his life and exacts his best powers, while the latter can never imagine that any exertion to which he devotes his time and efforts can appear to others as unimportant and even puerile. An honest cobbler, resoleing an old boot, gives himself up heart and soul to his work, nevertheless he admits that there are far more interesting and important things for humanity than the repairing of damaged sole-leather. The ego-maniac, on the contrary, if he is a writer, does not hesitate to declare, like Mallarmé, ‘The world was made to lead up to a fine book.’ This absurd exaggeration of one’s own occupations and interests produces in literature the Parnassians and the Æsthetes.