This is incorrect though, because there is an outer world. Reality is reality and no individual can change that. Sure you can live by storybook fantasies all you want but it doesnt make the stories real. My religion used to say don't get involved in sports or tabletop games, because they will become your religion. This is a control method by people who want to strictly control my minds narrative. This is what religion does, it manipulates people into thinking things that are not true. You can ramble all day about perspective and axioms and shit like that, but what matters is what is true and what isn't, and God himself has not proven himself to be TRUE. We are just tiny beings on a tiny planet trying as best we can to understand, and religion impedes that progress.