“ “It was morning; through the high window I saw the pure, bright blue of the sky as it hovered cheerfully over the long roofs of the neighboring houses. It too seemed full of joy, as if it had special plans, and had put on its finest clothes for the.
I believe that this quote is saying that only our true self, our soul, is our truth. The truth inside will always be there us, until we die that is our reference point. Therefore, making our soul the "whole world".