A compass, no matter what direction we turn, always points us to the North Pole—a destination most of us will never reach in our lifetimes; but one that is steady, dependable, and always true. A compass makes a good metaphor for our spiritual lives and the work of discerning God’s will for us. Our window is marked off on four sides like directional points of a compass.
The four (compass) points are each emphasized with a keystone. A keystone is the element of an arch that holds everything together. Looking at our four, I am reminded of four watchwords of the Reformation: sola gratia, sola fide, sola scriptura, sola deo gloria—grace alone, faith alone, scripture alone, to the glory of God alone!
The window itself contains symbolism as a particular type of window. The history of round openings into places of worship dates to classical Rome and was integrated into Christian church architecture during the Romanesque period. A round window in a worship space is called an “oculus” or “eye.”