Among the loosely organized complexes in many individuals, and possibly in all of us, there are certain dispositions toward views of life which represent natural inclinations, desires, and modes of activity which, for one reason or another, we tend to suppress or are unable to give full play to. Many individuals, for example, are compelled by the exactions of their duties and responsibilities to lead serious lives, to devote themselves to pursuits which demand all their energies and thought and which, therefore, do not permit of indulgence in the lighter enjoyments of life, and yet there may be a natural inclination to partake of the pleasures which innately appeal to all mankind and which many pursue. The longing for these recurs from time to time. The mind dwells on them, the imagination is excited and weaves a fabric of pictures, thoughts, and emotions which thus become associated into a complex. There may be a rebellion and "kicking against the pricks" and thereby a liberation of the emotional force that impresses a stronger organization on the whole process. The recurrence of such a complex is one form of what we call a "mood," which has a distinctly emotional tone of its own. The revival of this feeling tone tends to revive the associated ideas and vice versa. Such a feeling-idea complex is often spoken of as "a side to one's character," to which a person may from time to time give play. Or the converse of this may hold, and a person who devotes his life to the lighter enjoyments may have aspirations and longings for more serious pursuits, and in this respect the imagination may similarly build up a complex which may express itself in a mood. Thus a person is often said to have "many sides to his character," and exhibits certain alternations of personality which may be regarded as normal prototypes of those which occur as abnormal states.