This section is from the book "Mind-Power: The Secret Of Mental Magic", by William Walker Atkinson. Also available from Amazon: Mind Power: The Secret of Mental Magic.
These vibrational emotional colors, of course, combine, and blend into each other in countless combinations, but the above will give you a key to the same.
The vibrational colors of the two mental poles can scarcely be called colors at all, for their colors and shades are derived from the character of the feeling inspiring them, which gives to them the degree of vibration and color indicating the motive or emotive impulse. But there may be seen a difference even in these two; that is, the emotive pole, in its currents of Desire-Force, shows a scintillating effect, as if there were a multitude of minute sparks, or stars in the current; and the motive pole, in its currents of "Will-Power shows an effect something like a multitude of tiny and minute lightning-flashes, playing in the stream or current.
In addition to the shades mentioned above, there is another that should be mentioned while we are considering the subject. I allude to what might be called the "vitality vibrations," which radiate from the living body, and which are caused by the "vital force" which permeates the body during life, and makes possible the running of the physical machinery - some prefer to call it nerve-force. These vibrations show no special color, although when near, or in the body, they manifest a faint reddish tint. But when seen away from the body they show a lack of color, like clear water, and resemble the heated air arising from a stove, lamp, or heated ground - that is to say, they look like a colorless, vibrating body of air. The degree and strength of these vibrations depend upon the state of physical health of the person manifesting them.
Now, as we gaze upon our Mind-Power Picture, and see moving thereon the shapes and forms of human beings, we may see that each being is surrounded with an "aura" or egg-shaped "atmosphere" of these Emotional Vibrations - radiations emanated from his mental states. This aura extends out from the body for a distance of about one yard, and gradually fades away as the distance from the body is increased. And the aura of each person is seen to be colored according to the vibrations belonging to his prevailing mental states.
Each mental state shows itself in its appropriate shade, in the proper combinations, blendings, etc., and therefore, the trained occultist is able to read a person's character like an open book, from these emotional colors. And even though one may not be manifesting any special mental state at the moment, his aura will still be colored because of his prevailing mental state - his "character," as it were. And of course, these vibrations composing the aura of a person will affect those coming in contact with, or near him, or her. That is the reason why we feel the "personal atmosphere" of people when we come near them. Even beyond the visible aura, the vibrations continue in a fainter degree. And so, on our picture we can tell just what kind of people are passing before us - their mental states are revealed by the Emotional Colors.
And now we shall see how people affect others. We see one man approach another. The degree of dynamic positivity of the first man is superior to that of the second, and we see, as we watch, that the coloring of bis aura gradually interpenetrates that of the weaker man, and the coloring of the latter's aura gradually grows to more closely resemble that of the first man. We may watch the process, and thus become aware that the following things are happening, viz., the mental states of the first man are inducing similar feelings and emotions in the second man, by means of the currents of mentative energy that are flowing toward him. The first man is making no effort to impress the second man, but being the more positive his "magnetism" affects that of the other man and induces similar states. The second man "takes on the states" of the first man, as we may see by the change in coloring. This is the way that people unconsciously affect other people, and the latter are unconsciously affected. Simply a case of unconscious mentative induction, you see. The second man moves on, feeling more depressed, or elated, as the case may be, by reason of his contact with the first man, and also carrying away with him a little of the other man's general feelings, and "character." This second man, a little later on, meets another man, and we may see how this new man affects the "second man" by the suggestion of his manner and words. He does not seem to be sending out such strong currents as the man first spoken of, but his outward symbols of voice, words, manner, etc., are well acted out, and we soon see oar "second man" having mental states induced in him by suggestion. You have now seen two stages or phases of mentative induction.
Our positive man baa gone on his way, and soon he spies another man whom he wishes to influence in certain matters. Watch him now, and you will see something interesting. The positive man's aura seems to be disturbed, and great tongues of color seem to leap from it, and lap around the other man, the whole process resembling the action of tongues of flame or fire. These tongues of Mind-Power wrap themselves all around the other man and some seem to scintillate as they manifest the action of fairly "pulling" him toward the positive man, while others seem to be beating upon him like a rain of tiny flashes of lightning - the one is the play of Desire-Force, and the other the action of Will-Power. This gives us a good illustration of personal influence in an interview, or a phase of personal magnetism.
As the action grows more spirited, you may see the Will-Power of the positive man darting out in straight, sharp flashes, like great sparks from an electric battery, and you may see the process by which he beats down, and neutralizes the Will-Power of the weaker man, until he seems to exhaust it and take it captive, and the man acquiesces in the statements and demands of the stronger willed man. This process is hastened by the fact that the Desire-Force of the weaker man has become so impressed by the stronger will that it becomes dazed, or fascinated; the effect being strongly increased by the Desire-Force of the stronger man by setting up mentative induction a corresponding vibration in the desire-pole of the weaker man. And a fourth element in the attack is that the strong Desire-Force of the strong man also tends to "pull" the will of the weaker one toward it and away from its natural mate, its own desire-pole. This is a ease of a combined, determined attack. It is true that the positive man may not know a single fact regarding Mind-Power, but he has learned the process of affecting and influencing others, and bending them to his will and desire, although he is ignorant of the scientific explanation of the process. Every positive dynamic individual understands this, instinctively, and his knowledge increases as practice gives him more confidence in himself.
 
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