The limits of my language mean the limits of my world.
This remark provides a key to the question, to what extent solipsism is a truth. In fact what solipsism means, is quite correct, only it cannot be said, but it shows itself.
The world and life are one.
The thinking, presenting subject; there is no such thing.
The subject does not belong to the world but it is a limit of the world.
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.
The I occurs in philosophy through the fact that the “world is my world”.
For an answer which cannot be expressed the question too cannot be expressed. The riddle does not exist.
Whereof one cannot speak, thereof one must be silent.
Ludwig Wittgenstein – Tractatus Logico-Philosophicus