The 4 living creatures are the 4 powers moving in one nervous system: mind, will, labor, and spirit turning together as a single wheel. The number 4 fixes them to the flesh, the 4 corners of the body's temple, yet each face looks outward at once so a whole person is seen from every side. Reason governs, courage stands to the right, the working body bears the load, and vision lifts above all of it. These are not beasts in a sky; they are the driving forces alive in one who has awakened them.
Man: the reasoning mind that names and weighs
Lion: the courage and royal will seated on the right
Ox: the laboring body that carries the daily burden on the left
Eagle: the spirit that rises above the flesh and sees far
The number 4: the 4 corners of the body, spirit fastened to matter