The feelings depending upon physical sensations arise either from inherited tendencies and inclinations or from acquired habits and experience. It is an axiom of the evolutionary school that any physical activity that has been a habit of the race, long continued, becomes an instinctive pleasure-giving activity in the individual. For instance, the race for many generations was compelled to hunt, fish, travel, swim, etc., in order to maintain existence. The result is that we, the descendants, are apt to find pleasure in the same activities as sport, games, exercise, etc. Many of our tendencies and feelings are inherited in this way. To these we have added many acquired habits of physical activity, which follow the same rule, _i.e._, that habit and practice impart more or less pleasurable feeling. We find more pleasure in doing those things which we can do easily or quite well than in the opposite kind of things. The feelings depending upon ideas may also arise from inheritance. Many of our mental tendencies and inclinations have come down to us from the past. There are certain feelings that are born in one, without a doubt; that is to say, there is a great capacity for such feelings which will be transformed into manifestation upon the presentation of the proper stimulus. Other mental feelings depend upon our individual past experience, association, or suggestions from others--upon our past environment, in fact. The ideals of those around us will cause us to experience pleasure or pain, as the case may be, under certain circumstances; the force of suggestion along these lines is very strong indeed. Not only do we experience feelings in response to present sensations, but the recollection of some previous experience will also arouse feeling. In fact, feelings of this kind are closely bound up with memory and imagination. Persons of vivid imagination are apt to feel far more than others. They suffer more, and enjoy more. Our sympathies, which depend largely upon our imaginative power, are the cause of many of our feelings of this kind. Many of the facts which we generally ascribe to feeling are really a part of the phenomena of emotion, the latter being the more complex phase of feeling. For the purposes of this consideration we have regarded simple feeling as the raw material of emotion, the relation being compared to that existing between sensation and perception. In our consideration of emotion we shall see the fuller manifestation of feeling, and its more complex expressions. CHAPTER XI. The Emotions.