The variety of shapes of thought forms is almost endless. Each combination of thought and feeling creates its own form, and each individual seems to have his own peculiarities in this respect. The forms I have above described, however, will serve as typical cases to illustrate the more common classes of appearances. The list, however, might be indefinitely expanded from the experience of any experienced occultist, and is not intended to be full by any means. All varieties of geometrical forms are found among the thought forms, some of them being of remarkable beauty. In considering the subject of projected thought forms, moreover, it must be remembered that they partake of, and manifest, the same colors as does the aura itself, for they are composed of the same material and are charged with the same energy. But, note this difference, that whereas the aura is energized from the constant battery of the organism of the individual, the thought form, on the contrary, has at its service only the energy with which it was charged when it was thrown off--being a storage battery, as it were, which in time expends all of its power and then is powerless. Every thought form bears the same color that it would possess if it had been retained in the body of the aura itself. But, as a rule, the colors are plainer, and less blended with others--this because each thought form is the representation of a single definite feeling or thought, or group of same, instead of being a body of widely differing mental vibrations. Thus the thought form of anger will show its black and red, with its characteristic flashes. The thought form of passion will show forth its appropriate auric colors and general characteristics. The thought form of high ideal love will show its beautiful form and harmonious tinting, like a wonderful celestial flower from the garden of some far off Paradise. Many thought forms never leave the outer limits of the aura, while others are projected to great distances. Some sputter out as they travel, and are disintegrated, while others continue to glow like a piece of heated iron, for many hours. Others persist for a long time, with a faint phosphorescent glow. A careful study of what has been said regarding the characteristics of the various feelings and emotions, as manifested in the auric body, will give the student a very fair general idea of what may be the appearance of any particular variety of thought form, for a general principle runs through the entire series of auric phenomena. An understanding of the fundamental principles will lead to an understanding of any of the particular varieties of the manifestation thereof. Finally, remember this: A thought form is practically a bit of the detached aura of a person, charged with a degree of his prana, and energized with a degree of his life energy. So, in a limited sense, it really is a projected portion of his personality. CHAPTER VII. PSYCHIC INFLUENCE OF COLORS.