Hence it comes about that the three aspects of each of the three sides of our equilateral triangle are ceremonially personified by the nine officers of the Chapter-three in the East representing the spiritual side, three in the West figuring the soul or psychical side, and three subordinate links connecting these other two.
Walter Leslie Wilmshurst - The Meaning of Masonry, Chapter 4.
Walter Leslie Wilmshurst - The Meaning of Masonry, Chapter 4.