THE TWO EFFECTS OF THOUGHT
Each definite thought produces a double effect—a radiating vibration and a floating form. The thought itself appears first to clairvoyant sight as a vibration in the mental body, and this may be either simple or complex. If the thought itself is absolutely simple, there is only the one rate of vibration, and only one type of mental matter will be strongly affected. The mental body is composed of matter of several degrees of density, which we commonly arrange in classes according to the sub-planes. Of each of these we have many sub-divisions, and if we typify these by drawing horizontal lines to indicate the different degrees of density, there is another arrangement which we might symbolise by drawing perpendicular lines at right angles to the others, to denote types which differ in quality as well as in density. There are thus many varieties of this mental matter, and it is found that each one of these has its own especial and appropriate rate of vibration, to which it seems most accustomed, so that it very readily responds to it, and tends to return to it as soon as possible when it has been forced away from it by some strong rush of thought or feeling. When a sudden wave of some emotion sweeps over a man, for example, his astral body is thrown into violent agitation, and its original colours are or the time almost obscured by the flush of carmine, of blue, or of scarlet which corresponds with the rate of vibration of that particular emotion. This change is only temporary; it passes off in a few seconds, and the astral body rapidly resumes its usual condition. Yet every such rush of feeling produces a permanent effect: it always adds a little of its hue to the normal colouring of the astral body, so that every time that the man yields himself to a certain emotion it becomes easier for him to yield himself to it again, because his astral body is getting into the habit of vibrating at that especial rate.
The majority of human thoughts, however, are by no means simple. Absolutely pure affection of course exists; but we very often find it tinged with pride or with selfishness, with jealousy or with animal passion. This means that at least two separate vibrations appear both in the mental and 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.