The chakras or force-centres are points of connection at which energy flows from one vehicle or body of a man to another. Anyone who possesses a slight degree of clairvoyance may easily see them in the etheric double, where they show themselves as saucer-like depressions or vortices in its surface. When quite undeveloped they appear as small circles about two inches in diameter, glowing dully in the ordinary man; but when awakened and vivified they are seen as blazing, coruscating whirlpools, much increased in size, and resembling miniature suns.
All these whirlpools are perpetually rotating, and into the hub or open mouth of each a force from the higher world is always flowing - a manifestation of the life-stream issuing from the Second Aspect of the Solar Logos - which we call the primary force. That force is sevenfold in its nature, and all its forms operate in each of these centres, although one of them in each case usually predominates over the others. Without this inrush of energy the physical body could not exist. Therefore the centres are in operation in every one, although in the undeveloped person they are usually in comparatively sluggish motion, just forming the necessary vortex for the force, and no more. In a more evolved man they may be glowing and pulsating with living light, so that an enormously greater amount of energy passes through them, with the result that there are additional faculties and possibilities open to the man.
C. W. Leadbeater - The Chakras, 1927.