“An ultimate simulation needs an ultimate computer, and the new science of digitalism says that the universe itself is the ultimate computer — actually the only computer. Further, it says, all the computation of the human world, especially our puny little PCs, merely piggybacks on cycles of the great computer. Weaving together the esoteric teachings of quantum physics with the latest theories in computer science, pioneering digital thinkers are outlining a way of understanding all of physics as a form of computation.

From this perspective, computation seems almost a theological process. It takes as its fodder the primeval choice between yes or no, the fundamental state of 1 or 0. After stripping away all externalities, all material embellishments, what remains is the purest state of existence: here/not here. Am/not am. In the Old Testament, when Moses asks the Creator, “Who are you?” the being says, in effect, “Am.” One bit. One almighty bit. Yes. One. Exist. It is the simplest statement possible.”

https://www.physics.princeton.edu/ph115/LQ.pdf