 Despite a belief in reincarnation, the Lingbao School maintained the traditional Daoist idea that certain techniques could allow an adherent to achieve immortality. One technique was to ingest the essence of the sun and the moon. Practitioners would expose themselves to the celestial bodies at certain times of the month. Closing their eyes, they would visualize that the essences would solidify and enter their bodies. Once in the body, the sun's essence was matched to the heart and visualized as red, while the moon's was matched with the kidneys and seen as black. Besides interior meditation practices, immortality could be achieved through the ingestion of potions or talismans.
