Walker Percy on "A Theory of Man"

From his essay, "Is a Theory of Man Possible?":

. . . I suspect that most of us, whether we consciously profess it or not, are already equipped with a theory of man.  indeed, it is hard to imagine how one can live one's life and work with other people day in and day out unless one has already made certain assumptions about one's own nature as well as other people's.  It may be as impossible for us not to have a theory of man as it is impossible tor primitive man not to have a theory of the world and its origins. . . .