Individual opinions cannot be tossed into a common hat, like small coins. Though we may each learn from the others, there is no magic by which our several thoughts can sum themselves up into a common fund of public opinion or super-personal whole which thinks itself, there being no collective head to think it. No matter how many people think and behave as I do, each of us knows only his own thought and behavior. My thought may be about you and what I judge you are thinking, but it is not the same as your thought. To each the social is _nil_ except in so far as he experiences it himself, and to each it is something unique when viewed from within. The uniformity and illusion of identity--in short, the impersonal aspect of social thinking and activity appears only when we try to view social behavior from without--that is, as objectively manifest in the behavior of others. What then is the secret of this impersonal view of the social? Why do we think of ourselves socially in the same impersonal or external way that we think of others? There is an interesting parallel here in the behavior of certain types of mental pathology. There are neurotics who commonly feel that certain aspects of their behavior are really not of their own authorship, but come to them as the result of influences acting from without. It was such phenomena in part that led psychologists of a generation ago to construct the theory of "multiple personality." It is known now that the psychic material which in these cases appears to be automatic, and impersonal, in the sense that it is not consciously willed, is really motivated by unconscious mechanisms. The apparently "impersonal" behavior of the neurotic is psychologically determined, though unconsciously.