I know

That this world exists

That I am placed in it like my eye in its visual field

That something about it is problematic

Which we call its meaning

– Ludwig Wittgenstein

I believe that a certain feeling of amazement that anything should exist at all, was sometimes experienced by Wittgenstein.

– Norman Malcolm

I told Wittgenstein he was mad and he said God preserve me from sanity.

– Bertrand Russell