Aura / astral body
These terms describe the shell surrounding our physical bodies. It is invisible to human beings, with the exception of those who practice occult disciplines. Depending on the tradition, the aura can be shaped of up to seven layers. The color of the aura varies with the health and spiritual elevation of the individual. The color is usually clear when that person is far along in their spiritual growth. It is darker when someone has not grown much spiritually.