Pure essential oils are the volatile liquids build from Plants shrubs trees and roots. When you walk through a flower garden and brush across a rose bush they put off an aroma. Or when you cut a rose petal and see the liquid inside that is the essential oil. It is the lifeblood of a plant. So much like our blood is to us the essential oil is to the plant. It heals the plant when it is cut and helps regulate the plant. When you look at us and Them, there is a comparison, and that is why they work well with our bodies. So the oil from the plant does some of the same things for us as it does for itself.