"How we envy you, envy you! Lucky humans, who can close your minds to the endless deeps of space! You have this thing you call... boredom? That is the rarest talent in the universe! We heard a song — it went 'Twinkle twinkle little star....' What power! What wondrous power! You can take a billion trillion tons of flaming matter, a furnace of unimaginable strength, and turn it into a little song for children! You build little worlds, little stories, little shells around your minds, and that keeps infinity at bay and allows you to wake up in the morning without screaming!”

- Terry Pratchett, A Hat Full of Sky