When you sit for a while without moving the body, it stops receiving information about its edges through the senses, such as the friction of your clothing, or an itch on your leg. So, although you know the body is there, you don’t feel it. Some people get frightened at this point and involuntarily their body twitches and defines its edges. Then they slowly move to that place again, and gradually they learn to trust it and they begin to go a little bit further each time. Next comes the off-sensation of the mind. The mind is dependent upon thoughts, but when the thoughts disappear, the mind disappears, the self disappears.

Excerpt From: The Art of Just Sitting Edited By: John Daido Loori.