Silver plate brooch in Celtic Tree of Life design with green CZ stone. Legend: The Tree of Life symbol can be found in many cultures including that of the Ancient Celts (Druids.) The Celtic Tree of Life depicts the forces of nature which converge together to create harmony, unity and balance of the universe. Celts believed the Trees of Life or Crann Bethadh to be the symbol of 'Creator' which provided food, warmth and shelter. Celtic people attribute qualities such as wisdom, strength, longevity, prosperity, abundance, and protection to the Tree of Life, the design of which has roots and branches that are interwoven to form an endless knot, representing eternity and the timelessness of nature.