Terry Goodkind said this quote

“ The Grace represented the world of life, the world of the dead, and the way magic and Creation linked them. The outer circle of the design represented the beginning of the infinite world of the dead. Inside the outer circle was a square, its points just touching the outer circle. Inside the square was another circle, just touching the insides of the square. The area between those two circles with the square represented the world of life. The inside circle was life's beginnings, the outer circle its end, where souls crossed through the veil into the eternity of the underworld. An eight-pointed star inside the smaller circle was the Light of Creation. Lines from the star's points radiated out across the inner circle. the square. and across the outer circle that also symbolized the veil to the wold of the dead. The lines radiating outward from the Light represented the spark of the gift that journeyed with everyone from birth, through life, and on into death. ”