The melancholy science from which I make this offering to my friend relates to a region that from time immemorial was regarded as the true field of philosophy, but which, since the latter's conversion into method, has lapsed into intellectual neglect, sententious whimsy and finally oblivion: the teaching of the good life. What the philosophers once knew as life has become the sphere of private existence and now of mere consumption, dragged along as an appendage of the process of material production, without autonomy or substance of its own.