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...a large number of vibrations exist both above and below these two sections, and that there are therefore many light effects that cannot be seen and many tones to which the ear is deaf. In the case of light, the activity of these higher and lower vibrations is easily perceived in the effects produced by the ultra-violet rays at one end of the spectrum and the heat rays at the other end.
In fact, vibrations of every conceivable degree of speed exist, filling the entire wide space between slow sound waves and fast light waves. Furthermore, there are undoubtedly vibrations that are slower than those of tones and an infinite number of them that are faster than those perceived as light. Thus, one begins to understand that the vibrations through which one sees and hears are like only two tiny groups of a few strings on a giant harp of truly infinite extent. When one considers how much has already been learned through the use of these small fragments, one can already sense the possibilities that will arise if one were able to work in harmony with the great, wonderful whole.
Furthermore, it should be noted that different human beings differ from one another in their ability to respond to the few vibrations that lie within the range of our physical senses, even if only within relatively narrow limits. I am not thinking here of the sharpness of sight or hearing that enables one person to see a smaller object or hear a quieter tone than another. Here, it is not the sharpness of vision that is considered, but the extent of receptivity.
If someone, for example, takes a good and suitable prism and uses it to cast a bright spectrum onto a sheet of white paper, and then has a number of people draw the outermost limits of the spectrum as it appears to them on the paper, then one will almost always be able to state that their vision is quite different. Some will see much more of the violet color than others;
: 5 :
some will perhaps see less violet than most, while perceiving more at the red end. There will also perhaps be some who can see more at both ends than most others, and these will certainly be the so-called sensitive individuals who possess a higher degree of physical or psychic receptivity people. They are actually receptive to a larger number of vibrations than most people of our time.
With hearing, one can prove the same difference if one takes, for example, a tone that is just high enough to be heard, one that is, so to speak, on the limit of audibility, and observes how many people out of a given number are capable of hearing it. The cry of a bat is a well-known example of such a tone, and experience teaches that on a summer evening, when the entire air is filled with these shrill, piercing calls of these small animals, a large number of people are absolutely incapable of hearing them at all.
Now these examples show very clearly that there is no fixed limit to the human ability to perceive vibrations of either the ether or the air, but that some of today's occultists those who study hidden or supernatural powers and laws already possess this ability to a higher degree. One will even find that a person's capacity for receptivity is different on different occasions. One can therefore easily imagine that it may be possible for a person to develop this power and, in the course of time, learn to see much that is invisible to their fellow human beings and hear much that is inaudible to others. We now know exactly that a large number of these finer vibrations exist and are, in a sense, only waiting to be perceived.
The experiences with X-rays original: "Röntgenstrahlen" give an example of the wonderful results achieved when only some of these finer vibrations are brought to human consciousness. The transparency of many substances under the influence of these rays, which were previously considered opaque, suddenly shows at least one way in which such a type of elementary clairvoyance can be explained, such as the reading of a letter inside a sealed envelope.
Vocabulary: Vibrations, spectrum, light waves, sound waves, prism, violet, sensitive people, bat, ether, occultists, X-rays, clairvoyance