The symbol of wholeness, represented by the medicine wheel, is still being used in D/Lakota ceremonies today. The center where the "X" crosses is considered the home of Tunkasila, Wakan-Tanka, God. I speculated, If this is the symbol of wholeness, the symbol of the psyche, with Wakan-Tanka at the center, then Wakan-Tanka or God would be within you.
Dr. A.C. Ross (Ehanamani) Lakota
Actually we were fooling ourselves, for deep down in every man, woman, and child, is the fundamental idea of God. It may be obscured by calamity, by pomp, by worship of other things, but in some form or other it is there. For faith in a Power greater than ourselves, and miraculous demonstrations of that power in human lives, are facts as old as man himself.
We finally saw that faith in some kind of God was a part of our make-up, just as much as the feeling we have for a friend. Sometimes we had to search fearlessly, but He was there. He was as much a fact as we were. We found the Great Reality deep down within us. In the last analysis it is only there that He may be found. It was so with us.
Big Book pg. 55
Grandfather, for this day, let me remember that you are the center.