The first element arises in the equilibrium of light and dark, but at a time when light has the momentum, when light is increasing. Astronomically, this moment is called the vernal equinox, but most of us know it simply as the first day of spring. Astrologically, the vernal equinox symbolizes the birth of the element fire. This is the principle of

energy manifested into the five basic principles, or elements: Ether (space), Air, Fire, Water and Earth. This concept of the five elements lies at the heart of Ayurvedic science.