Byrne told me that you can't fix your exact position on the earth without referring to some point in the sky. Something to do with triangulation, the technique of measurement, I forgot the details. The crux was compelling to me, though, it's never left me since. A man can't know where he is on the earth exept in relation to the moon or a star. Astronomy comes first, land maps follow because of it. Just the opposite of what you'd expect. If you think about it long enough, it will turn your brain inside-out. A here exist only in relation to a there, not the other way around. There's this only because there's that; if we don't look up, we'll never know what's down. Think of it, boy. We find ourselves only by looking to what we're not. You can't put your feet on the ground until you've touched the sky.