This world. We should live in this one. We can imagine other worlds, other realties, but those fantasy worlds are basically entertainment. We should really work hard to live in this world. This world now. As the wise man said: Be here, now.
Time and time again we are reminded that lots of mayhem and mischief can ensue when a human being gets lost in some other world. Worlds beyond. Beyond life. We can pursue a "life trip," or a "death trip."
Lots of human beings conjure up some weird world-view, we dignify it by calling it "religious," but often this world-view, is really a sick and twisted vision, one that's strangely death-enamored. If you are focused on a heaven and a hell, you are missing the splendor of this world now.
If you have a better idea, a better vision, let's make it work in this world. This one is all we really have. Life is real. It's the world. Now.