Others beings are below us in evolution--animals, plants, minerals, and elemental lives--as the Angels are above us; and as we thus study, a conception dawns upon us of a vast Wheel of Life, of numberless existences, inter-related and necessary each to each, man as a living Intelligence, as a self-conscious being, having his own place in this Wheel. The Wheel is ever turning by the divine Will, and the living Intelligences who form it learn to co-operate with that Will, and if in the action of those Intelligences there is any break or gap due to neglect or opposition, then the Wheel drags, turning slowly, and the chariot of the evolution of the worlds goes but heavily upon its way.

These numberless Lives, above and below man, come into touch with human consciousness in very definite ways, and among these ways are sounds and colours. Each sound has a form in the invisible world, and combinations of sounds create complicated shapes.[331] In the subtle matter of those worlds all sounds are accompanied by colours, so that they give rise to many-hued shapes, in many cases exceedingly beautiful. The vibrations set up in the visible world when a note is sounded set up vibrations in the worlds invisible, each one with its own specific character, and capable of producing certain effects. In communicating with the sub-human Intelligences connected with the lower invisible world and with the physical, and in controlling and directing these, sounds must be used fitted to bring about the desired results, as language made up of definite sounds is used here. And in communicating with the higher Intelligences certain sounds are useful, to create a harmonious atmosphere, suitable for their activities, and to make our own subtle bodies receptive of their influences.

Esoteric Christianity, or The Lesser Mysteries — Part 116

This effect on the subtle bodies is a most important part of the occult use of sounds. These bodies, like the physical, are in constant vibratory motion, the vibrations changing with every thought or desire. These changing irregular vibrations offer an obstacle to any fresh vibration coming from outside, and, in order to render the bodies susceptible to the higher influences, sounds are used which reduce the irregular vibrations to a steady rhythm, like in its nature to the rhythm of the Intelligence sought to be reached. The object of all often-repeated sentences is to effect this, as a musician sounds the same note over and over again, until all the instruments are in tune. The subtle bodies must be tuned to the note of the Being sought, if his influence is to find free way through the nature of the worshipper, and this was ever done of old by the use of sounds. Hence, music has ever formed an integral part of worship, and certain definite cadences have been preserved with care, handed on from age to age.

Esoteric Christianity, or The Lesser Mysteries — Part 116