How To Understand The Universe When You’re Stuck Inside Of It
The statement that there’s nothing outside the universe — there’s no observer outside the universe — implies that we need a formulation of physics without background structure. The event has relations with the rest of the universe, and that set of relations constitutes its “view” of the universe. The idea is to try to reformulate physics in terms of these views from the inside, what it looks like from inside the universe.
Source: www.quantamagazine.org