The world is like an illusion and a dream. The world you see is just the "horizon" you can see. When the "horizon" changes, the world changes accordingly. The "horizon" is infinite, so the world is also infinite. It is also like Zhuang Zhou dreaming of butterflies and Zhuang Zhou dreaming of butterflies. Which one is true and which one is false? Both true and false. The mountain you see, in another "horizon", may be a sea. The mountains and the sea are different, but the mountains and the sea blend together.
Concept: How to define the reality of the world