The Celtic knot motif presumably originates from Egyptian cloth patterns which were brought to Britain by Coptic Christians over the course of the 5th and 6th centuries and quickly found their place in Celtic art.
Due to its infinite links and interconnections, the Celtic knot symbolizes the cosmic thread of life and the eternal cycle of nature - because the Celtic knot has neither a beginning nor an end, it represents the spiritual connection of the soul and the earth in the course of eternal rebirths.