Ji FU quoted The Pipe and Christ by William Stolzman
Spiritually called to take part in Lakota Sioux rituals, the author of The Pipe and …
I said to a Full-blood friend that it seems that Christianity on the reservation has been purifying the Lakota religion long before Vatican II indicated it should be done. To this he replied, "Yes that is true. But don't forget. The Lakota religion had been purifying the Catholic Church too, especially since Vatican II. I don't know why it has taken you smart guys so long to get with it. *
— The Pipe and Christ by William Stolzman (Page 127)