In "Life Is A Living Spirit," Omraam relates the Magic Circle to the Human Aura:
“’In the beginning was the Word,’ the first movement of the Divine Spirit who created the circle of the universe. In the same way, before a magus performs a magical rite, he forms a circle around himself. The origin of this custom, which dates from very ancient times, is to be found in the secret science concerning the human aura. When we read that a magus must stand within the circle he has drawn, this does not mean, simply, that he must draw a material circle on the ground and stand with in it. It means that he must create the living circle of his aura and take up his stand within it. In other words, his spirit must be active and watchful, otherwise he runs the risk of falling prey to invisible entities. If a magus is content to draw a material circle around himself but has not lived in such a way as to develop a pure, brilliant, powerful aura, he may, perhaps, get what he wanted from the ceremony, but when he steps out of his magic circle, all those entities who obeyed him while he was in it (for the invisible entities respect the symbol of the circle and obey the magic formulas pronounced by magus), will cluster around him to pursue and harass him.
Any magician who is unaware of these laws will have problems of this kind. The invisible entities, who are well aware that his aura is neither pure nor luminous, will end by revenging themselves on him by forcing them to obey him in spite of his unworthiness. Magicians of this kind do not know that in the beginning is the Word. They do not know, in other words, that before launching into all kinds of bold undertakings, they should build up an aura, a true magic circle of light. But this circle cannot be drawn automatically, with a piece of chalk or any other material means; it can only be created by love, purity and selflessness. Why do you suppose that so many people who embark upon the practice of magic not only fail to get any results, but seem to become prone to all kinds of mishaps? It is because their aura is not sufficiently powerful, luminous and pure, so when they try to project a thought they have no materials with which to clothe it or make it strong. If you want a thought to take flight you have to give it wings, and those wings can be found can only be found in your aura.
‘In the beginning was the Word, and the Word was with God, and the Word was God.’ When God created this great luminous circle He impregnated with His own essence. Trees, plants, animals and men were all, at one time, images floating in God's aura. Everything that exists, exists in the aura of God. As St. Paul put it: In Him we live and move and have our being. We are all immersed in God's aura; it permeates and pervades every particle and fiber of our being.”
This is from Omraam's book, Life Is A Living Spirit, one of the books that Wayne has requested for his MU 1008 course, pages 15 - 17.