At times, Zen does get into some Buddhist Cosmology. Nishijima Roshi, my main teacher would talk about that and almost every time immediately say that it was only one way of looking at it. Whenever addressing realms of Heaven or Hell, he'd also address that it was just a psychological state.

Just know that your expectations are only thoughts in your head, and keep on doing what you do.

A lot of seriously insane people have managed to acquire huge followings based on the idea that their insanity is a kind of enlightenment. An obvious example would be Charles Manson or Shoko Asahara who is the person responsible for the Sarin gas attack on the Tokyo subway.

I'm not sure that Eastern culture does either, but I've never lived in India etc so I couldn't tell you. I can say we definitely don't. So people will sometimes come in contact with something strange and think, "Oh, it must be like this" and have a lot of fantasies about it, and somebody who sort of looks like our fantasy version of what enlightenment is can be very convincing in seeming like they've got something and then play that role.

If a tree falls in the forest and it hits a mime, would he make a noise?

Zazen isn't about blissing out or going into an alpha brain-wave trance. It's about facing who and what you really are, in every single goddamn moment. And you aren't bliss, I'll tell you that right now. You're a mess. We all are.

Sanity and enlightenment...I've been reading a new book Dogen's Genjo Koan: Three Commentaries, and it contains a commentary on Genjo Koan by Shunryu Suzuki, the author who wrote Zen Mind, Beginners Mind. He doesn't mention sanity at all but I think that one possible definition of enlightenment would be a kind of profound sanity, where being insane is no longer an option.