Here we see that solipsism strictly carried out coincides with pure realism. The I in solipsism shrinks
to an extensionless point and there remains the reality co-ordinated with it.
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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.