So it is seen that though born in elemental instinct and passion, human sexual love is something far different in its flowering. And yet without its root it would not be, and cannot be. This is an excellent example of the complex nature of the most common emotions. It may be used as a typical illustration. What is true of it is also true, in a way and in a degree, of every other form of emotion. Therefore in studying a particular emotion, be not too quick to cry, "It is this; it is that!" but rather seek to say, "It is composed of this and that, of this and that!" Few, if any, emotions are simple; the majority are very complex. Hence the difficulty of satisfactory classification, and the danger of dogmatic definition. CHAPTER XVIII. The Role of the Emotions. The average person greatly underestimates the part played by the emotional nature in the mental activities of the individual. He is inclined to the opinion that, with the exception of the occasional manifestation of some strong emotional feeling, the majority of persons go through life using only the reasoning and reflective faculties in deciding the problems of life and guiding the mental course of action. There can be no greater mistake concerning the mental activities. So far from being subordinate to the intellect, the emotional nature in the majority of cases dominates the reasoning faculties. There are but very few persons who are able to detach themselves, even in a small degree, from the feelings, and to decide questions cold-bloodedly by pure reason or intellectual effort. Moreover, there are but few persons whose wills are guided by pure reason; the feelings supply the motive for the majority of acts of will. The intellect, even when used, is generally employed to better carry out the dictates of feeling and desire. Much of our reasoning is performed in order to justify our feelings, or to find proofs for the position dictated by our desires, feelings, sympathies, prejudices, or sentiments. It has been said that "men seek not reasons but _excuses for their actions_."