Due to a lack of specific proofs or publications, determining the actual meaning of Celtic symbols is challenging. In a lot of circumstances, you have to trust the artist’s interpretation of a symbol. As a result, the quaternary knot sign might represent or denote four directions (East, West, North, and South). Earth, Fire, Water, and Air are four natural elements that could be represented by the symbol. Samhain, Beltane, Imbolc, and Lughnasadh, Celts’ fire festivals, could potentially be an interpretation of the quaternary symbol. The quaternary symbol could possibly be a clue to Tuatha’s hidden treasures.