‘The world’, although ‘common’ to all persons and in that sense ‘shareable’, is possibly never experienced by two individuals in absolutely the same way. When two men look at a landscape, and one likes it and the other does not, there is already a gulf between them. To one man the landscape may simply be itself, full of its ‘is-ness’: he feels a delicate sadness, perhaps, at his otherness from it. To the other the ‘same’ trees and sky and grass are seen as creation: as a veil, revealing through themselves their Creator. For one man there may be little or no sense of connection between himself and nature outside himself; for the same person, on another occasion, there may not even be any essential distinctions between inside, outside, self, and nature. In so far as we experience the world differently, in a sense we live in different worlds.
R.D. Laing, Self and Others, 1961