As an enormous screen or reflector the astral light hangs over the earth and becomes a powerful universal hypnotizer of human beings. The pictures of all acts good and bad done by our ancestors as by ourselves, being ever present to our inner selves, we constantly are impressed by them by way of suggestion and go then and do likewise. Upon this the great French priest-mystic, Éliphas Lévi, says: "We are often astonished when in society at being assailed by evil thoughts and suggestions that we would not have imagined possible, and we are not aware that we owe them solely to the presence of some morbid neighbor; this fact is of great importance, since it relates to the manifestation of conscience--one of the most terrible and incontestable secrets of the magic art.... So diseased souls have a bad breath, and vitiate the moral atmosphere; that is to say, they mingle impure reflections with the astral light which penetrates them, and thus establish deleterious currents." There is also a useful function of this light. As it preserves the pictures of all past events and things, and as there is nothing new under the sun, the appliances, the ideas, the philosophy, the arts and sciences of long buried civilizations are continually being projected in pictures out of the astral into the brains of living men. This gives a meaning not only to the oft-recurring "coïncidence" of two or more inventors or scientists hitting upon the same ideas or inventions at about the same time and independently of each other, but also to other events and curious happenings. Some self-styled scientists have spoken learnedly of telepathy, and other phenomena, but give no sufficient reason in nature for thought-transference or apparitions or clairvoyance or the hundred and one varieties of occurrences of an occult character noticed from day to day among all conditions of men. It is well to admit that thought may be transferred without speech directly from one brain to another, but how can the transference be effected without a medium? That medium is the astral light. The moment the thought takes shape in the brain it is pictured in this light, and from there is taken out again by any other brain sensitive enough to receive it intact.