make first a circle whose diameter is three fingers, because of the three cross-nails of the Lord, or five fingers because of the five wounds of Christ, or seven for the seven sacraments, or nine for the nine orders of angels, but usually five fingers will suffice. Then make a second within this circle, let it be a distance from the first two grains because of the two Tablets of the Law of Moses, or three grains because of the persons of the Trinity.[4]