And so it is with the various forms of Energy. Science teaches that Light, Heat, Magnetism and Electricity are but forms of vibratory motion connected in some way with, and probably emanating from the Ether. Science does not as yet attempt to explain the nature of the phenomena known as Cohesion, which is the principle of Molecular Attraction; nor Chemical Affinity, which is the principle of Atomic Attraction; nor Gravitation (the greatest mystery of the three), which is the principle of attraction by which every particle or mass of Matter is bound to every other particle or mass. These three forms of Energy are not as yet understood by science, yet the writers incline to the opinion that these too are manifestations of some form of vibratory energy, a fact which the Hermetists have held and taught for ages past. The Universal Ether, which is postulated by science without its nature being understood clearly, is held by the Hermetists to be but a higher manifestation of that which is erroneously called matter--that is to say, Matter at a higher degree of vibration--and is called by them "The Ethereal Substance." The Hermetists teach that this Ethereal Substance is of extreme tenuity and elasticity, and pervades universal space, serving as a medium of transmission of waves of vibratory energy, such as heat, light, electricity, magnetism, etc. The Teachings are that The Ethereal Substance is a connecting link between the forms of vibratory energy known as "Matter" on the one hand, and "Energy or Force" on the other; and also that it manifests a degree of vibration, in rate and mode, entirely its own.