يمكن القول: «إن حدّ الكون أنه لا حدّ له». فيكون الكون مكتفياً بذاته تماماً، لا يتأثر بشيء خارج نفسه. لا يُخلق ولا يُفنى، بل هو ببساطة يَكون.

“One could say: "The boundary condition of the universe is that it has no boundary." The universe would be completely self-contained and not affected by anything outside itself. It would neither be created nor destroyed. It would just BE.”Stephen Hawking — The Illustrated Theory of Everything: The Origin and Fate of the Universe (2003)