astral bodies—frequently more than two. The radiating vibration, therefore, will be a complex one, and the resultant thought-form will show several colours instead of only one.

HOW THE VIBRATION ACTS

These radiating vibrations, like all others in nature, become less powerful in proportion to the distance from their source, though it is probable that the variation is in proportion to the cube of the distance instead of to the square, because of the additional dimension involved. Again, like all other vibrations, these tend to reproduce themselves whenever opportunity is offered to them; and so whenever they strike upon another mental body they tend to provoke in it their own rate of motion. That is—from the point of view of the man whose mental body is touched by these waves—they tend to produce in his mind thoughts of the same type as that which had previously arisen in the mind of the thinker who sent forth the waves. The distance to which such thought-waves penetrate, and the force and persistency with which they impinge upon the mental bodies of others, depend upon the strength and clearness of the original thought. In this way the thinker is in the same position as the speaker. The voice of the latter sets in motion waves of sound in the air which radiate from him in all directions, and convey his message to all those who are within hearing, and the distance to which his voice can penetrate depends upon its power and upon the clearness of his enunciation. In just the same way the forceful thought will carry very much further than the weak and undecided thought; but clearness and definiteness are of even greater importance than strength. Again, just as the speaker's voice may fall upon heedless ears where men are already engaged in business or in pleasure, so may a mighty wave of thought sweep past without affecting the mind of the man, if he be already deeply engrossed in some other line of thought.

It should be understood that this radiating vibration conveys the character of the thought, but not its subject. If a Hindu sits rapt in devotion to Kṛiṣhṇa, the waves of feeling which pour forth from him stimulate devotional feeling in all those who come under their influence, though in the case of the Muhammadan that devotion is to Allah, while for the Zoroastrian it is to Ahuramazda, or for the Christian to Jesus. A man thinking keenly upon some high subject pours out from himself vibrations which tend to stir up thought at a similar level in others, but they in no way suggest to those others the special subject of his thought. They naturally act with special vigour upon those minds already habituated to vibrations of similar character; yet they have some effect on every mental body upon which they impinge, so that their tendency is to awaken the power of higher thought in those to whom it has not yet become a custom. It is thus evident that every man who thinks along high lines is doing missionary work, even though he may be entirely unconscious of it.

THE FORM AND ITS EFFECT

Let us turn now to the second effect of thought, the creation of a definite form. All students of the occult are acquainted with the idea of the elemental essence, that strange half-intelligent life which surrounds us in all directions, vivifying the matter of the mental and astral planes. This matter thus animated responds very readily to the influence of human thought, and every impulse sent out, either from the mental body or from the astral body of man, immediately clothes itself in a temporary vehicle of this vitalised matter. Such a thought or impulse becomes for the time a kind of living creature, the thought-force being the soul, and the vivified matter the body. Instead of using the somewhat clumsy paraphrase, "astral or mental matter ensouled by the monadic essence at the stage of one of the elemental kingdoms," theosophical writers often, for brevity's sake, call this quickened matter simply elemental essence; and sometimes they speak of the thought-form as "an elemental." There may be infinite variety in the colour and shape of such elementals or thought-forms, for each thought draws round it the matter which is appropriate for its expression, and sets that matter into vibration in harmony with its own; so that the character of the thought decides its colour, and the study of its variations and combinations is an exceedingly interesting one.

This thought-form may not inaptly be compared to a Leyden jar, the coating of living essence being symbolised by the jar, and the thought energy by the charge of electricity. If the man's thought or feeling is directly connected with someone else, the resultant thought-form moves towards that person and discharges itself upon his astral and mental bodies. If the man's thought is about himself, or is based upon a personal feeling, as the vast majority of thoughts are, it hovers round its creator and is always ready to react upon him whenever he is for a moment in a passive condition. For example, a man who yields himself to thoughts of impurity may forget all about them while he is engaged in the daily routine of his business, even though the resultant forms are hanging round him in a heavy cloud, because his attention is otherwise directed and his astral body is therefore not impressible by any other rate of vibration than its own. When, however, the marked vibration slackens and the man rests after his labours and leaves his mind blank as regards definite thought, he is very likely to feel the vibration of impurity stealing insidiously upon him. If the consciousness of the man be to any extent awakened, he may perceive this and cry out that he is being tempted by the devil; yet the truth is that the temptation is from without only in appearance, since it is nothing but the natural reaction upon him of his own thought-forms. Each man travels through space enclosed within a cage of his own building, surrounded by a mass of the forms created by his habitual thoughts. Through this medium he looks out upon the world, and naturally he sees everything tinged with its predominant colours, and all rates of vibration which reach him from without are more or less modified by its rate. Thus until the man learns complete control of thought and feeling, he sees nothing as it really is, since all his observations must be made through this medium, which distorts and colours everything like badly-made glass.

If the thought-form be neither definitely personal nor specially aimed at someone else, it simply floats detached in the atmosphere, all the time radiating vibrations similar to those originally sent forth by its creator. If it does not come into contact with any other mental body, this radiation gradually exhausts its store of energy, and in that case the form falls to pieces; but if it succeeds in awakening sympathetic vibration in any mental body near at hand, an attraction is set up, and the thought-form is usually absorbed by that mental body. Thus we see that the influence of the thought-form is by no means so far-reaching as that of the original vibration; but in so far as it acts, it acts with much greater precision. What it produces in the mind-body which it influences is not merely a thought of an order similar to that which gave it birth; it is actually the same thought. The radiation may affect thousands and stir up in them thoughts on the same level as the original, and yet it may happen that no one of them will be identical with that original; the thought-form can affect only very few, but in those few cases it will reproduce exactly the initiatory idea.

The fact of the creation by vibrations of a distinct form, geometrical or other, is already familiar to every student of acoustics, and "Chladni's" figures are continually reproduced in every physical laboratory.