The Trinity knot, also called the Triquetra, is one of the best-known symbols in Celtic culture. Familiarly, the Trinity Knot symbolizes God's eternal love of the Holy Trinity looped through the arcs emphasizing unity of the three such as the mind, body and spirit. When mind, body and spirit are in harmony, happiness is the natural result. The symbol thus also appears on rocks throughout the Celtic region associated with the three elements of nature, water, earth and air. Water represents our emotions, air symbolizes our thoughts,

Little is known about the triquetra before the Christian era. Many pagans believe that the triquetra represents the three aspects of the Goddess, while Christians hold that the symbol represents the holy trinity.