What is at the center of the universe?
Is it our sun? Or is it some other planet? Or is it a black hole? Or is the center the Big Bang from which everything has been ever-expanding? Or maybe it is some other unknown galaxy or matter, that science has yet to discover?
Who knows.
But for all practical purposes, we each are the centers of our own universes. Every single moment of our lives, every hour, every day, we are constantly weaving intricate stories around our lives that have only one protagonist – we ourselves. If we can keep ourselves in the background, and bring others around us into the main scene, then we would likely make good spiritual progress.