Celtic artwork is braided, entwined, knotted with loops of mystery and magic. Everything seems to fold onto something else, as well as back onto itself. The tongue of a bird twists and turns its way around the borders of a scene to become the tail of some other animal. One beast's claw becomes another's paw. You get the feeling that birds, beasts, humans, trees, and plants share a mystical understanding that nothing is separate, that all is one. You get the feeling that this is the way things are supposed to be.
— Tom Cowan, Yearning for the Wind