Circles often recur in Celtic culture, where it symbolizes the eternal comeback we also find in other Celtic designs as the triskell. Another recurrent element are knots, weaves intended to represent how everything is tightly connected with anything else; one is all and all is one: every single thread weaves with the others and participate in forming a unique pattern that endlessly comes back. According to some sources the circle would also represent the doorstep leading to the magical world of spirits.