From this Nietzsche deduces the formula which is at the bottom of all individualistic philosophy, namely: that what is immoral for one man is moral for another, and that the application of any moral code is undesirable for the reason that no system of conduct can apply alike to all men. Thus any attempt on the part of any one man to direct the actions of any other man is in itself an immorality, because it is an attempt to hinder and retard the development of the individual. It must not be thought that Nietzsche's arrival at this conclusion is a direct and simple affair based on superficial observation. Nor is it in itself the end for which he strives. To the contrary, the conclusion is stated mainly by inference. The work he lays out for himself is one of analysis, and under his critical scalpel fall religions, political institutions and nations, as well as individuals. Wherever he finds a belief whose origin is considered divine, he tears away its surface characteristics and inquires into it. In every instance he finds a human ground for it. Going still further, he points out that all institutions, in order to meet the constantly fluctuating conditions of society, must subject themselves to change. A multiplicity of themes comes under Nietzsche's observation in this work. Not only is there a great deal of abstract reasoning but also a vast amount of brilliant and penetrating criticism of men and art. Ancient and modern philosophers, novelists, poets, musicians, dramatists, as well as theories of art, literature and music, here come under his careful and acute analysis. There are passages of startling poetry interpolated between paragraphs of cynical and destructive research. Nietzsche reveals himself as a scholar, the philologist, the historian and the scientist, as well as the thinker. The amount of general knowledge he displays in nearly every line of human endeavour is astonishing. In his most elaborate processes of ratiocination he is always capable of adhering to authenticated facts. He never side-steps into the purely metaphysical or denies the existence of corporeality once it has been assumed as a hypothesis. He breaks once and for all with the metaphysicians and word-jugglers. Denying all reason in the Kantian sense, he is always scrupulously reasonable.