Yes, very expansive! (but not expEnsive!)
Bill Harris talks about it alot, getting to an egoless state through meditation practice. Actualy, that is talked about in a lot of places- Aikido, QiGong, "non-attachement" In Zen, it is part of Satori.
What amazes me, is that in 30 minutes, you can accomplish one of the things that takes many years of meditation(hi-tec or not!) Of course, meditation has many other benefits too.
I found that after experiencing Big Mind, my meditation practice deepened quite a bit.
