Thought experiment: You go for a walk down the street, just for a wander. You look around as you walk, and get to the end of the street. You've seen everything, right? No. Turn around and walk back. See the other side of buildings, the reverse view. And why not now walk back up the street, looking down at the flowers, into the gutter, that cat on the fence and your own shadow in front of you. There. Hey, but turn around and look up as you walk back home. Check out the tops of the buildings, the trees swaying in the wind, the hot air balloon floating through the sky, the clouds drifting, and the very colour of the sky.
Bingo. You know this street. You've seen it all. Nope, you'll never see it all. But there is so much to keep you going