William Walker Atkinson 
The Human Aura: Astral Colors and Thought Forms 

The Aura is the invisible emanation radiating from every individual. An ethereal radiation. The egg-shaped human nebula. Psychic atmosphere sensed by everyone but seen by but few. The clairvoyant vision. The phosphorescent flame, and luminous cloud. The colors in the aura and what they mean. Effect of mental states, emotion, and passion, upon its aura. The human aura is a very important and interesting phase of every personality. The finer forces, the most powerful. William Walker Atkinson (December 5, 1862 – November 22, 1932) was an attorney, merchant, publisher, and author, as well as an occultist and an American pioneer of the New Thought movement.