Every harmonious condition of Nature's evolutions is governed by one incontrovertible law; that of concordant assimilative harmony. This concordant key is the ruling one over all the antagonistic, negative, discordant ones; the one that diverts the disturbance of sympathetic equilibrium to one general concentrative centre for redistribution. Harmony concentrates, harmony distributes. The focalizing point of concordant sympathetic concentration is the percussive electric field, where the velocity of its sympathetic streams rebounds with a power that throws them far out into universal space; and so far beyond their equative centre of equilibrium as to bring them in sympathy with the universal attraction of the combined neutral centres of all planetary masses. Sympathetic Streams which Control the Action and Reaction of all Visible Forms of Matter. What is light and heat, and how are they evolved? and why are they so intensely perceptible as emanating from the solar world? Light and heat, considered theoretically, belong to the highest orders of the phenomenal. They can only be accounted for by the velocity of sympathetic streams, as interchangeable to and from centres of negative and attractive focalization. In considering the velocity of vibration, as associated with the projection of a ray of light, to be at least one hundred thousand billions per second, it is easy to account for the origin and demonstration of these two elements by the action of celestial sympathetic streams. 1st. Light and heat are not evolved until the force of the vibratory sympathetic stream, from the neutral centre of the sun, comes into atomic percussive action against the molecular atmosphere or envelope of our planet. The visibility of the planets can only be accounted for in this way, some in a great degree, some in less. Innumerable thousands, it may be, remain invisible to us by not having the conditions surrounding them, and associated with them, which favour the atomic and molecular antagonistic friction necessary to make them visible. The velocity of a steel ball passing through the atmospheric envelope, at a speed of thousands of billions times less than an etheric sympathetic stream, would be dissipated into vapour in an indefinite period of a second of time. Light and heat, in a certain sense, are one and the same; light giving heat, and heat giving light. The whole mystery, as associated with their evolution, is explained by the bombardment of the sympathetic etheric stream on the dense portion of the molecular, in seeking the sympathetic, concordant, neutral centre of the planetary mass that surrounds the point of focalization.