The spiral design can be found in many cultures and time periods throughout history. The Celts had a special affinity for the spiral, as is seen through the complex art depicting increasingly more intricate spiral and Triskele patterns.
As with most Celtic symbolism the original meaning of the spiral as seen by the early Celts is a bit of a mystery. However there are several theories on this intriguing symbol. At its core the spiral shows how one point can spread creating a “wave” that affects everything else around it.
This relates to the thought that everything in the world is linked and that the actions of one affects all. It could also be used to represent the spin and flow of the universe, never standing still, never staying the same, but always in flux.