1. The phraseology of the medical schools will more and more become based on vibration and be expressed in terms of sound and color.
2. The religious teaching of the world and the inculcation of virtue will be likewise imparted in terms of color. People will eventually be grouped under their ray-color, and this will be possible as the human race develops the faculty of seeing auras. The number of clairvoyants is already greater than is realized, owing to the reticence of the true psychic.
3. The science of numbers, being in reality the science of color and sound, will also somewhat change its phraseology and colors will eventually supersede figures.
4. The laws that govern the erection of large buildings and the handling of great weights will some [250] day be understood in terms of sound. The cycle returns, and in the days to come will be seen the reappearance of the faculty of the Lemurians and early Atlanteans to raise great masses, - this time on a higher turn of the spiral. Mental comprehension of the method will be developed. They were raised through the ability of the early builders to create a vacuum through sound, and to utilize it for their own purposes.
5. Destruction, it will be shewn, can be brought about by the manipulation of certain colors, and by the employment of united sound. In this way terrific effects will be achieved. Color can destroy just as it can heal; sound can disrupt just as it can bring about cohesion; in these two thoughts lie hid the next step ahead for the science of the immediate future. The laws of vibration are going to be widely studied and comprehended and the use of this knowledge of vibration on the physical planes will bring about many interesting developments. They will be partially an outgrowth of the study of the war and its effect, psychological and otherwise. More was effected by the sound of the great guns, for instance, than by the impact of the projectile on the physical plane. These effects are as yet practically unrecognized, and are largely etheric and astral.
6. Music will be largely employed in construction, and in one hundred years from now it will be a feature in certain work of a constructive nature. This sounds to you utterly impossible, but it will simply be the utilization of ordered sound to achieve certain ends. [251]

You will ask, what place has all this in a series of letters on meditation? Simply this: that the method employed in the utilization of color and sound in healing, in promoting spiritual growth, and in exoteric construction on the physical plane, will be based on the laws that govern the mental body, and will be forms of meditation. Only as the race develops the dynamic powers and attributes of thought - which powers are the product of meditation, rightly pursued - will the capacity to make use of the laws of vibration be objectively possible. Think not that only the religious devotee or mystic, or the man imbued with what we call higher teaching, is the exponent of the powers attained by meditation. All great capitalists, and the supreme heads of finance, or organized business, are the exponents of similar powers. They are personifications of one-pointed adherence to one line of thought, and their evolution parallels that of the mystic and the occultist. I seek most strongly to emphasize this fact. They are the ones who meditate along the line of the Mahachohan, or the Lord of Civilization or Culture. Supreme concentrated attention to the matter in hand makes them what they are, and in many respects they attain greater results than many a student of meditation. All they need to do is to transmute the motive underlying their work, and their achievement will then outrun that of other students. They will approach a point of synthesis, and the Probationary Path will then be trodden.

The Law of Vibration will gradually, therefore, be more and more understood, and be seen to govern action in all of the three departments of the Manu, the World Teacher and the Mahachohan. It will find its basic expression and its familiar terminology in those of color and sound. Emotional disorder will be regarded as discordant sound; mental lethargy will be expressed in terms of low [252] vibration, and physical disease will be numerically considered. All constructive work will eventually be expressed in terms of numbers, by colors, and through sound.