While I dislike to dwell on the subject, I feel that I should call the attention of my students to the fact that certain teachers seek to produce the abnormal psychic condition by means of exhausting breathing exercises, which make the person dizzy and sleepy. This is all wrong. While rhythmic breathing exercises have a certain value in psychic phenomena, and are harmless when properly practiced, nevertheless such practices as those to which I have alluded are harmful to the nervous system of the person, and also tend to induce undesirable psychic conditions. Again, some teachers have sought to have their students hold their breath for comparatively long periods of time in order to bring about abnormal psychic states. The slightest knowledge of physiology informs one that such a practice must be harmful; it causes the blood to become thick and impure, and deficient in oxygen. It certainly will produce a kind of drowsiness, for the same reason that impure air in a room will do the same thing—in both cases the blood stream is poisoned and made impure. The purpose of rational and normal breathing is to obviate just this thing—so these teachers are reversing a natural law of the body, in order to produce an abnormal psychic state. With all the energy in me, I caution you against this kind of thing.

Along the same line, I protest and warn you against the practices advised by certain teachers of "psychic development," who seek to have their pupils induce abnormal physical and psychic conditions by means of drugs, odor of certain chemicals, gases, etc. Such practices, as all true occultists know, belong to the clans of the Black Magicians, or devil worshippers, of the savage races—they have no place in true occult teachings. Common sense alone should warn persons away from such things—but it seems to fail some of them. I assert without fear of intelligent contradiction, that no true occultist ever countenances any such practices as these.

All the true teachers are vigorous in their denunciation of such false teachings and harmful practices. In this same category, I place the methods which are taught by certain persons, namely, that of inducing abnormal physical and psychic condition of giddiness and haziness by means of "whirling" around in a circle until one drops from giddiness, or until one "feels queer in the head." This is a revival of the practices of certain fanatics in Persia and India, who perform it as a religious rite until they fall into what they consider a "holy sleep," but which is nothing more than an abnormal and unhealthful physical and psychic condition. Such practices are a downward step, not an upward one. It seems a pity that the necessity has arisen for such warnings as these—but my duty, as I see it, is very plain. To all who are tempted to "develop" in this way, I say, positively, "DON'T!"

The scientific, rational way to develop the astral senses is to first acquire the art of concentrating. Bear in mind that in concentration the person, while shutting out the impressions of the outside world in general, nevertheless focuses and concentrates his attention upon the one matter before him. This is quite a different thing from making oneself sensitive to every current of thought and feeling that may be in the psychic atmosphere. True concentration renders one positive, while the other methods render one negative. Contrary to the common opinion, psychic concentration is a positive state, not a negative—an active state, not a passive one. The person who is able to concentrate strongly is a master, while one who opens himself to "control," either physical or astral, is more or less of a slave to other minds.

The student who will begin by experimenting along the lines of contact mind-reading, and who then advances along the lines of true telepathy, as explained in the earlier chapters of this book, will have made a good start, and considerable progress, along the road to clairvoyant development. The rest will be largely a matter of exercise and practice. He will be aided by practicing concentration along the general lines of the best occult teaching. Such practice may consist of concentration upon almost any physical object, keeping the thing well before the mind and attention. Do not tire the attention by practicing too long at one time. The following general rules will help you in developing concentration:

(1) The attention attaches more readily to interesting rather than uninteresting things. Therefore, select some interesting thing to study and analyze by concentrated thought.

(2) The attention will decline in strength unless there is a variation in the stimulus. Therefore, keep up the power of concentration by either changing the object you are observing; or else by discovering some new properties, qualities or attributes in it.

(3) The things you wish to shut out of consciousness can best be shut out by your concentration upon some other thing—the attention can dwell only upon one thing at a time, if focused upon that one thing.

(4) The power of applying your attention, steady and undissipated, to a single object, is a mark of strong will and superior mental discipline—weak-minds cannot do this. Therefore, in cultivating concentrated attention you are really strengthening your mind and will.

(5) To develop concentrated attention, you must learn to analyze, analyze, and analyze the thing upon which you are bestowing concentrated attention. Therefore, proceed by selecting an object and analyzing it by concentrated attention, taking one part after another, one by one, until you have analyzed and mastered the whole object. Give it the same attention that the lover gives his loved one; the musician his favorite composition; the artist his favorite work of art; and the booklover his favorite book—when you have accomplished this, you have mastered concentration, and will be able to apply the mind "one pointed" upon anything you wish, physical or astral; and, consequently will have no trouble in shutting-out disturbing impressions.