What do we know about how the chariot of the four living creatures moves?

St. Jacob of Sarug says the following about the way they move, which is difficult for us to explain: “You will be mightily filled with surprise, in awe of this fearful chariot, let alone by the Charioteer; for He is the Son of God. It is difficult for you to hear, and difficult for me to speak, for the matters of the seraphim cannot be explained. Four living creatures for the four directions of the cosmos are bound together. Each living creature emerges, one by one, without colliding. The one facing the east speeds towards the east that lies before him; the one facing the west speeds towards the west as he must; the one facing the south hastens without turning; and the one facing the north, to the north he proceeds with great power. If the leader proceeds in a direction, all follow him without confusion; all pursue towards the

four directions, bound together … whoever dares to [attempt to] explain such astounding matters makes himself a laughing stock, and exposes his lack of knowledge.”