“All I can say is this: when I practice this art which I have learned, with my mind concentrated on one simple thing, it is a relaxation as restful, as seemingly ‘complete’ as when I am in that state called normal sleep. The attention is not allowed to be on the sensations of the body, or on anything but the one thing it is deliberately ‘concentrated’ on. “Undivided concentration, then, means, for purposes of this experiment, a state of complete relaxation, under specified control. To concentrate in this undivided way you first give yourself a ‘suggestion’ to the effect that you will relax your mind and your body, making the body insensitive and the mind a blank, and yet reserving the power to ‘break’ the concentration in a short time. By making the body insensitive I mean simply to relax completely your mental hold of, or awareness of, all bodily sensation. After giving yourself this suggestion a few times, you proceed to relax both body and mind. Relax all mental interest in everything in the environment; inhibit all thoughts which try to wander into consciousness from the subconsciousness, or from wherever else thoughts come. This is clearly a more thorough affair than ‘just relaxing.’ “Also, there is something else to it—the power of supervising the condition. You succeed presently in establishing a blank state of consciousness, yet you have the power to become instantly conscious, also; to realize when you are about to go into a state of sleep, in which you have not the power of instantly returning to consciousness. Also, you control, to a certain degree, what is to be presented to consciousness when you are ready to become conscious. For example, you want a message from the person who is sending you a message; you do not want a train of subconscious ‘day dreams.’ “All this is work; and so far, it is a bore. But when you have learned to do it, it is an art worth knowing. You can use it, not only for such experiments as telepathy and clairvoyance, but for improving your bodily health. To relax thoroughly several times each day while holding on to a suggestion previously ‘planted’ in the subconsciousness is more beneficial to health than any other one measure I know.