In all the more instinctive part of our nature we are dominated by impulses to certain kinds of activity, not by desires for certain ends. Children run and shout, not because of any good which they expect to realize, but because of a direct impulse to running and shouting. Dogs bay the moon, not because they consider that it is to their advantage to do so, but because they feel an impulse to bark. It is not any purpose, but merely an impulse, that prompts such actions as eating, drinking, love-making, quarreling, boasting. Those who believe that man is a rational animal will say that people boast in order that others may have a good opinion of them; but most of us can recall occasions when we have boasted in spite of knowing that we should be despised for it. Instinctive acts normally achieve some result which is agreeable to the natural man, but they are not performed from desire for this result. They are performed from direct impulse, and the impulse is often strong even in cases in which the normal desirable result cannot follow. Grown men like to imagine themselves more rational than children and dogs, and unconsciously conceal from themselves how great a part impulse plays in their lives. This unconscious concealment always follows a certain general plan. When an impulse is not indulged in the moment in which it arises, there grows up a desire for the expected consequences of indulging the impulse. If some of the consequences which are reasonably to be expected are clearly disagreeable, a conflict between foresight and impulse arises. If the impulse is weak, foresight may conquer; this is what is called acting on reason. If the impulse is strong, either foresight will be falsified, and the disagreeable consequences will be forgotten, or, in men of a heroic mold, the consequences may be recklessly accepted. When Macbeth realizes that he is doomed to defeat, he does not shrink from the fight; he exclaims:— Lay on, Macduff, And damned be him that first cries, Hold, enough! But such strength and recklessness of impulse is rare. Most men, when their impulse is strong, succeed in persuading themselves, usually by a subconscious selectiveness of attention, that agreeable consequences will follow from the indulgence of their impulse. Whole philosophies, whole systems of ethical valuation, spring up in this way: they are the embodiment of a kind of thought which is subservient to impulse, which aims at providing a quasi-rational ground for the indulgence of impulse. The only thought which is genuine is that which springs out of the intellectual impulse of curiosity, leading to the desire to know and understand. But most of what passes for thought is inspired by some non-intellectual impulse, and is merely a means of persuading ourselves that we shall not be disappointed or do harm if we indulge this impulse.[1]