I'm yet to even attend my first class (going to observe this weeked), but my inter-faith work means that I've talked to a lot of people about this kind of thing.
The interesting fact is that all religions have their own versions of this, but it is bigger than religion. It is, for want of a better word, a spirituality thing. It's that point of complete awareness and lack of self-consciousness, the sense of being lost to something bigger than oneself and simultanesously being found. It's like swimming in a sea of Life.
The anabaptist perception/response in the discussions I've had is that these moments of enlightenment are not an end in themselves. They are equipping and enriching for a greater purpose.
Anyway, I'll get off the pulpit now!
Lyle, William, they are great ways to describe it.