The mental exercise known as meditation is found in all religious systems. Prayer is a form of discursive meditation, and in Hinduism the reciting of slokas and mantras is employed to tranquilize the mind to a state of receptivity. In most of these systems the goal is identified with the particular psychic results that ensue, sometimes very quickly; and the visions that come in the semi-trance state, or the sounds that are heard, are considered to be the end-result of the exercise. This is not the case in the forms of meditation practiced in Buddhism. There is still comparatively little known about the mind, its functions and its powers, and it is difficult for most people to distinguish between self-hypnosis, the development of mediumistic states, and the real process of mental clarification and direct perception which is the object of Buddhist mental concentration. The fact that mystics of every religion have induced on themselves states wherein they see visions and hear voi...