I've lived my life not believing in a creator, nor an afterlife of the Heaven or Hell type variety, but believing space is infinite, with infinite possibilities. This renders our lives on this tiny planet insignificant, and l'm happy with that, but think people should enjoy life as they wish, but try not to harm others. One of the early arguments about space being infinite, therefore with infinite amounts of stars, is why is the night sky not lit up with them, rather than dark? Obviously the fault is with our poor optics and the vast distances of the stars, but with advanced technology, we are getting there. As evidence, here's a recent photograph from the Hubble Space Telescope of a mere 500 million stars (roughly) in the Andromeda Galaxy.
Remember - enjoy life while you can. There's bugger all else.