Eternity vs Void - At the heart of Book of Infinities universe is the Ao-created meta-narrative of "eternity" vs "void". Simply put: the void is a space of possibilities, driven by causal forces. The arrow of time points in only one direction in the void, and the gods can enact actions that result in a semi-predictable progression of stories. The opposite of this concept is called Eternity: where actions have no lasting meaning, acts are powerless, and all things exist simultaneously.