There are two main directions which interest may take, because there are two worlds in which we live. There is the inner world of our feelings, our thoughts, our desires and our struggles,[1]--and there is the outer world, with its people, its things, its hostilities, its friendships, its problems and facts, its attractions and repulsions. Man divides his interest between the two worlds, for in both of them are the values of existence. The chief source of voluntary interest lies in desire and value, and though these are frequently in coalescence, so that the thing we desire is the thing we value, more often they are not in coalescence and then we have the divided self that James so eloquently describes. So there are types of men to whom the outer world, whether it is in its "other people," or its things, or its facts, or its attractions and repulsions, is the chief source of interest and these are the objective types, exteriorized folks, whose values lie in the goods they can accumulate, or the people they can help, or the external power they exercise, or the knowledge they possess of the phenomena of the world, or the things they can do with their hands. These are on the whole healthy-minded, finding in their pursuits and interest a real value, rarely stopping from their work to ask, "Why do I work? To what end? Are things real?" Contrasted with them are those whose gaze is turned inward, who move through life carrying on the activities of the average existence but absorbed in their thoughts, their emotions, their desires, their conflicts,--perhaps on their sensations and coenaesthetic streams. Though there is no sharp line of division between the two types, and all of us are blends in varying degrees, these latter are the subjective introspective folk, interiorized, living in the microcosmos, and much more apt than the objective minded to be "sick souls" obsessed with "whys and wherefores." They are endlessly putting to themselves unanswerable questions, are apt to be the mentally unbalanced, or, but now and then, they furnish the race with one whose answers to the meaning of life and the direction of efforts guide the steps of millions. [1] Herbert Spencer's description of these two worlds is the best in literature. "Principles of Psychology."