Ludwig Wittgenstein on Open individualism

“There is really only one world soul [Weltseele], which I for preference call my soul and as which alone I conceive what I call the souls of others.”

“There is therefore really a sense in which in philosophy we can talk of a non-psychological I. The I occurs in philosophy through the fact that the "world is my world". The philosophical I is not the man, not the human body or the human soul of which psychology treats, but the metaphysical subject, the limit—not a part of the world.”