And yet the philosophers are guilty of the same superficiality as the man in the street. They do not go far enough into the matter to perceive that the morality of pleasure, of interest, and of duty, Hedonism, Utilitarianism and the Categorical Imperative, all lead in very slightly different ways to the same goal--Eudæmonism. The fulfilment of duty affords spiritual satisfaction, a pre-eminently pleasurable emotion which increases in direct proportion to the effort which its fulfilment demands. Interest also implies pleasure, for every interest ultimately comes to this, that it is an attempt to secure a pleasure. This aim lies at the bottom of all interests; it is the fundamental interest from which all seemingly different interests are derived; it is the universal goal to which all human effort tends, whether it be a question of making money to satisfy ambition, of winning love and friendship, of material, spiritual, personal or social values. Interest is self-assertion and the intensifying of the zest for life. But these are always accompanied by pleasurable emotions; thus interest is forthwith identified with pleasurable emotion, even though one has to work hard, even though at the moment it entails drudgery and discomfort. Hedonism makes no secret of its nature and its tendency. It openly admits what the Categorical Imperative denies and what Utilitarianism veils with vague phrases: that the aim and object of moral action is Pleasure and nothing else. In our short survey of the immense field of literature dealing with moral philosophy we have learnt that, although the most various and divergent views are expressed as to the essence and source of Morality, nevertheless there is but one opinion, be it clearly or vaguely stated, be it the result of knowledge or surmise, as to the mechanism by means of which moral concepts determine action, and as to the conscious or unconscious aim of moral action: Moral concepts do their work by means of inhibition, and the aim of moral action is a feeling of happiness. CHAPTER II THE IMMANENCE OF THE CONCEPT OF MORALITY