Meditation is one of the most popular of all modern religious practices. It claims to work by profoundly "stilling" or otherwise dramatically influencing the mind. Through this process the meditator is allegedly able to perceive "true" reality, his own "true" divine nature, and finally achieve spiritual enlightenment. Meditation promoters also claim the practice has numerous health benefits. Are these statements true? The authors examine the validity of these claims and explain potential problems and dangers.