There is not a problem which perplexes human life that may not be loosened and solved by the aid of music. Based as it is upon the vibratory movements of Nature, and subject to rigid mathematical law and geometrical ratio, music represents an incorruptible and direct medium between the higher and lower natures of man. Its dynamical and spiritual power proceeds from the _blend_ of its related vibrating numbers; which blend is that living force (_within_ outward harmony) that electrifies the heart and mind and lifts the whole nature to the plane of soul. It is that living field of energy in which all numbers, all forces, all substances, are lost in the unity of least-common-multiple of all possible vibrations. It is the Veil of Isis. No motion can take place without causing sound. This must be equally true of atomic and planetary movements, and all that lies between. All sounds that appear to the senses as different must obviously vibrate in some universal medium which permits movement and unifies their seeming diversity. It is the actual presence of such a medium in man which enables him to perceive that which music is the expression of. Notes and chords are merely alphabetical symbols. These are classified and combined to express ideas as truly as words are combined to convey the thought that lies beyond them. It has been said that "The Universe is built by number." This is obvious truth when all natural forces and elements are conceived of as modes of vibration (as they actually are) blending and interblending in the universal etheric medium, according to the immutable law of harmonious ratios. Why should the etheric world be thought of as an abstraction or a far-off possibility? It is in reality a nearer thing in life than its comparatively trifling contents. All our thoughts and feelings move in it as their medium, and the process of self-conquest is nothing more than to live in this our universal home, and harmonize dissociated thoughts and feelings into musical symphonies. This is not rhapsody, but sober common sense, as true for the field-laborer as for the philosopher. As we all live in and breathe the same physical atmosphere, so do we all think and feel in the same mental ether. This fact explains why "Brotherhood is a fact in nature." To accept this principle of Brotherhood as the point from which life is viewed is equivalent to mounting to the hill-top of life from which the surrounding scenery can be seen. Down in the valley a single wall can shut out the whole prospect. A text-book on chemistry may be consulted with profit as illustrating this fact. A few general principles or laws classify millions of separate facts into harmonious knowledge. The science of chemistry is also the science of true music. Schopenhauer speaks of music