The reader may interrupt here with the question we encountered at the start: how is the dionysian individualist to know whether a given action will benefit him or injure him? The answer, of course, lies in the obvious fact that, in every healthy man, instinct supplies a very reliable guide, and that, when instinct fails or is uncertain, experiment must solve the problem. As a general thing, nothing is more patent than the feeling of power--the sense of efficiency, of capacity, of mastery. Every man is constantly and unconsciously measuring himself with his neighbors, and so becoming acutely aware of those things in which he is their superior. Let two men clash in the stock market and it becomes instantly apparent that one is richer, or more resourceful or more cunning than the other. Let two men run after an omnibus and it becomes instantly apparent that one is swifter than the other. Let two men come together as rivals in love, war, drinking or holiness, and one is bound to feel that he has bested the other. Such contests are infinite in variety and in number, and all life, in fact, is made up of them. Therefore, it is plain that every man is conscious of his power, and aware of it when this power is successfully exerted against some other man. In such exertions, argues Nietzsche, lies happiness, and so his prescription for happiness consists in unrestrained yielding to the will to power. That all men worth discussing so yield, despite the moral demand for humility, is so plain that it scarcely needs statement. It is the desire to attain and manifest efficiency and superiority which makes one man explore the wilds of Africa and another pile up vast wealth and another write books of philosophy and another submit to pain and mutilation in the prize ring. It is this yearning which makes men take chances and risk their lives and limbs for glory. Everybody knows, indeed, that in the absence of such a primordial and universal emulation the world would stand still and the race would die. Nietzsche asks nothing more than that the fact be openly recognized and admitted; that every man yield to the yearning unashamed, without hypocrisy and without wasteful efforts to feed and satisfy the yearning of other men at the expense of his own.