If you come across an insane person who's talking gibberish, you can't make any sense of it at all and that would be one way that enlightenment is different. If you read Dogen, a lot of his stuff is very strange and is coming from a different place than what we're used to, but at the same time, it's not senseless ramblings and that's part of what attracted me to Dogen. I didn't get it, but it was sane. It's not some guy raving about UFO's or Moses living in his bathtub, it's was actually something sane that I just didn't get, if that makes sense?