Thursday's Philosophical Thought

Here's one that you might have some fun getting your head around, from The World As Will and Idea by the German philosopher Arthur Schopenhauer (1788-1860):

"'The world is my idea' is a truth valid for every
living creature, though only man can consciously
contemplate it. In doing so he attains philosophical
wisdom. No truth is more absolutely certain than
that all that exists for knowledge, and, therefore,
the whole world, is only object in relation to subject,
perception of a perceiver-- in a word, idea.
The world is idea."