Book excerpt: "Most of us believe that we live in only three states of consciousness: wakefulness, sleep, and dreaming. But there is so much more. In [this book], ... Norman E. Rosenthal, M.D., [posits that] the ... daily practice of transcendental meditation (TM) can permanently improve your state of mind during the routine hours of waking life--placing you into a super-mind state of consciousness where you consistently perform at peak aptitude"--