And, what if everything were to end tomorrow? Or even right now?
Everything looks and feels so real, so solid--the rock-solid buildings, the night sky, the sunset earlier, the trees and lamp-posts and what-not standing stoically, that have been standing there for years, decades, and if we didn't do anything to them, they'd probably go on standing for centuries. (We overengineer and things often last much longer than we need them to, which is inefficient, but that's a whole different issue.)
Yet, perhaps none of that is real; even if it were, how real is it, really, in the face of the limitless void of our ever-expanding universe that the most brilliant of minds on this planet predict would one day collapse unto itself? I mean, really, we are but a speck in the cosmic vastness of the universe.
And even if we didn't look so far afield, just look at Chile and Haiti, or closer to home, the massive 2004 Sumatran earthquake and ensuing tsunami, which wiped out so many things, so many buildings, so many lives.
Life, it's terribly fragile. Suddenly the world feels too big and I feel too small, I should really sleep earlier, before such crazy thoughts enter my mind. Another reason not to take afternoon naps that span the entire afternoon.