busyI don't know why people call them mysterious, though. Every human being has an opportunity to study them, every night. You want to learn what happens? Lie down and pay attention. There's a whole branch of yoga on it, yoga nidra. I remember being startled by a poem I read in college, in which the poet talked about passing a "bright floor" before descending into the darkness of sleep -- being fascinated but unable to reach it.
I was like, dude, that's where I get off every night.
