The point at the center of the wheel cross represents the Most High God, the motionless mover, for the point at the center has no dimensions and cannot turn, yet all turns around it. Movement towards the center, towards God, is difficult against the centrifugal force of the turning wheel, whereas in the opposite direction, towards the outer darkness, no effort is required.
The Wheel Cross developed in the Celtic world from the Chi-Rho monogram representing Christ. The letter X (Chi) and P (Rho), the first two letters of Christ in Greek, were one over the other. After centuries, this symbol came to be enclosed in a circle, thus forming the wheel cross.