Wheels of Light
“We are not just physical bodies (…) for around is a pulsating electromagnetic energy field that is described either as a rainbow-like aura or as a luminous light body. This “subtle-energy” field interacts with our physical body by flowing through concentrated spirals of energy. In yoga practice, these spiraling energy centers are known as chakras, a Sanskrit word meaning ‘wheels of light’.
The Chakra Bible – by Patricia Mercier