In Chinese Terms, essential oils are medicines for the Shen, the spiritual essence that resides in the heart and governs consciousness. In *Ayurvedic terms, they enhance the flow of prana (life force), nouricsh ojas (nutritional/immunological essence, and brighten tejas (mental luminosity) - David Crow
*Ayurvedic medicine -- also known as Ayurveda -- is one of the world's oldest holistic (whole-body) healing systems. It was developed thousands of years ago in India. It is based on the belief that health and wellness depend on a delicate balance between the mind, body, and spirit.