"You use the word "Infinity" very glibly.... Have you ever been there? Time and space are extensions of the mind, the will. Which means that infinity is a purely local phenomenon. You can turn over a stone and find it crawling there. Or you can make it yourself out of whatever materials are at hand."

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I got a statistic for you right now. Grab your pencil, Doug. There are five billion trees in the world. I looked it up. Under every tree is a shadow, right? So, then, what makes night? I'll tell you: shadows crawling out from under five billion trees! Think of it! Shadows running around in the air, muddying the waters you might say. If only we could figure a way to keep those darn five billion shadows under those trees, we could stay up half the night, Doug, because there'd be no night!

— Ray Bradbury