Ezekiel 1:15

And so, I recognize more clearly what I read: For the wheel runs within the wheel and is not hindered (Ezek. 1:16-17). For he passes his life without any offense in any passion, and even within these things the wheel runs. The Law runs within grace, and obedience to the Law is within the course of divine mercy: for the more it turns, the more it is proven.

All things celestial and terrestrial, and whatever falls under human understanding, are turned by the wheels of the Sun. The Sun travels through its yearly circle, with the Moon coursing through each month. The Morning Star itself, known as Lucifer, as it twinkles from East to West, tempers the darkness of the night with a small light and completes its course in two years. The four other wandering stars, called planets, and everything that shines in the sky, as well as the varieties of crops, trees, and herbs, follow their courses in four seasons on their own respective wheels; and we behold nothing that has not existed before. The spirit moves by whirling and returns to its own circles. All rivers run into the sea, yet the sea is not full (Ecclesiastes 1:6-7). Why? Because they return to their sources from the deep abyss. But of the Gospels, that is, of the four living creatures that breathe, live, and understand, if anyone considers the wheel and its course, in a short time he will see the world to be complete with the Apostolic proclamation. The wheel is also within a wheel, or the joining of the two Testaments, which indicates the ladder of Jacob (Genesis 28) and the prophetic word of Isaiah (Isaiah 6) and the double-edged sword. Or it represents the harmonious Gospels whose course and stature tend towards heaven and touch the earth only briefly, always hastening towards the heights.

(Verse 15 and following) And as I looked at the animals, a wheel appeared on the earth beside the animals, having four faces. And the appearance of the wheels and their work was like the vision of the sea, and the four of them had the same likeness, and their appearance and work was as a wheel within a wheel. They went in the four directions, and they did not turn as they walked. The wheels also had a height and a terrifying appearance, and the whole body was full of eyes all around the four of them. LXX: And I saw, and behold, a wheel was following animals four over the earth. And the appearance of the wheels and their construction was like the color of tarshish. And their appearance was in four: and their work was as it were a wheel within a wheel. They walked in their four parts, and did not turn back when they walked. And their backs and their height were to them. And I saw them, and their backs were full of eyes all around the four. Up to this point, the picture describes the four living creatures that had four faces, following the spirits and the cloud that was in the midst of the spirit, now the individual wheels are mentioned for each animal, which were not attached to the animals but followed them. Or a wheel appeared upon the Earth, which, divided into four, had as many faces as the number of animals that followed. And such was the similarity of the four wheels to the four following animals, that one wheel was truly believed. And their work and creation was like the vision of tharsis, which we turn into the sea. The eagle placed the hyacinth; which stone resembles the sky. And their appearance was like one wheel in another, so that you would not believe it was one wheel, but rather one wheel joined to another. They were moving in four directions, and they were not being dragged or turned back. […]

Whoever is stretching forward, like a wheel, touching the earth with a small part of itself, is really such as that wheel was, about which Ezekiel spoke.

But what does the wheel signify except sacred Scripture, which turns from every side toward the minds of its hearers, and is held back from the way of its preaching by no corner of error? It turns from every side because amid adversity and prosperity it proceeds rightly and humbly. For the circle of its precepts is now above, now below, since what is spoken spiritually to the more perfect suits the weak according to the letter; and the very things that little ones understand according to the letter, learned men raise to the heights through spiritual understanding. For which of the little ones, in the deed of Esau and Jacob—that the one is sent to hunt so that he might be blessed, while the other is blessed by his father through his mother's substitution—is nourished except according to the history of sacred reading? In which history, if one is drawn a little more subtly to understanding, he sees that Jacob did not seize the blessing of the firstborn through fraud, but received what was owed to him, which he had purchased from his consenting brother for the price of lentils given. But if anyone thinking more deeply should wish to discuss the deeds of both through the mysteries of allegory, he immediately rises from history into mystery. For what does it mean that Isaac desired to eat from the hunting of his elder son, except that almighty God desired to be fed by the good works of the Jewish people? But while that one delayed, Rebecca substituted the younger, because while the Jewish people sought good works outside, mother grace instructed the gentile people to offer the food of good work to the almighty Father and to receive the blessing of the elder brother. […]