Although it seems very easy, it is not so easy. When a person begins to do it, no sooner does he close his eyes in order to concentrate than a thousand things come before him. Also his physical body becomes restive. It says, "This person is not conscious of me! " And then he gets nervous and twists and turns in order to be conscious of the body. The body does not like a person to be unconscious of it. It is like a dog or a cat; it likes one to take notice of it. Then a kind of nervous action arises in the body. It feels like moving, turning, scratching, or something. As soon as one wants to discipline the body, the body does not want to accept discipline.