Likewise, in the case of the wireless telegraphy, the electric energy produced by the sending instrument is transformed into subtle and finer etheric waves, which travel to the receiving instrument, and are there transformed into electric waves, the latter producing physical changes in the receiving apparatus which enable them to be read by the observer. In the case of wireless telephony there is still more complex process of transformation, as follows: the speaker conveys sound vibrations into the instrument; these are transformed into electric vibrations; and the latter into the etheric vibrations which travel through space to the receiver. Reaching the receiver, the etheric vibrations are transformed into ordinary electric vibrations, and these in turn into sound waves capable of being sensed by the listener. Example of Light Waves. The same process is detected in the transmission of what we call light waves. The activities manifested by the substance of the sun set up certain vibrations which we call "light vibrations." These are communicated to the ether in the form of so-called "light waves" but which are merely etheric waves of a certain rate of vibration. These waves travel through space and are transformed into "light" only when they reach some material substance capable of receiving and reflecting their vibrations. Science tells us that empty space is perfectly DARK, and that light manifests only when the etheric light vibrations come in contact with material substance and are there transformed into "light." Light, as "light" does not travel from the sun--what we know as "light" is simply the result of the transformation of certain etheric waves into "light" by reason of their contact with material substances. Transformation of Mental Vibrations Now for the analogy. Mental vibrations are so only when they remain in their own uninterrupted medium of channel of activity, i.e., the brain and the nervous system of the individual. Many hold that they are able to leap over the barrier of flesh separating two persons when such persons are in immediate physical contact, and the conditions are of a certain kind; but as a rule they do not do so. But, as all investigators know, mental vibrations are capable of being transformed into some subtle form of etheric vibrations, and the latter when coming in contact with the nervous system of other persons may be again transformed, this time into mental vibrations which produced thoughts, feelings and mental images in the minds of the second persons or persons, corresponding with these mental states in the first person. Think over this carefully, until you grasp the idea fully. Vibrational Attunement