Psalms 76:6

"By Thy chiding, O God of Jacob, there have slept all men that have mounted horses." Who are they that have mounted horses? They that would not be humble. To sit on horseback is no sin; but it is a sin to lift up the neck of power against God, and to deem one's self to be in some distinction. Because thou art rich, thou hast mounted; God doth chide, and thou sleepest. Great is the anger of Him chiding, great the anger. Let your Love observe the terrible thing. Chiding hath noise, the noise is wont to make men wake. So great is the force of God chiding, that he said, "By Thy chiding, O God of Jacob, there have slept all men that have mounted horses." Behold what a sleep that Pharaoh slept who mounted horses. For he was not awake in heart, because against chiding he had his heart hardened. For hardness of heart is slumber. I ask you, my brethren, how they sleep, who, while the Gospel is sounding, and the Amen, and the Hallelujah, throughout the whole world, yet will not condemn their old life, and wake up unto a new life. There was the Scripture of God in Judaea only, now throughout the whole world it is sung. In that one nation one God who made all things was spoken of, as to be adored and worshipped; now where is He unsaid? Christ hath risen again, though derided on the Cross; that very Cross whereon He was derided, He hath now imprinted on the brows of kings: and men yet sleep...

They slumbered who mounted horses. Let us speak according to the tropology. Indeed Pharaoh mounted horses, and slumbered, and perished. And the Egyptians had horses, but they perished. Hence too it was commanded in the Law that a Hebrew should not have a horse. Indeed Solomon too did not have a horse from Jerusalem or from Judaea, but bought them for himself from Egypt. Horses are always sold in Egypt. "These in chariots, and these in horses: but we will call upon the name of the Lord our God." Those, then, who mounted horses, slumbered and perished. Our Lord also has horses, and he has shining mountains: on the contrary, the devil too has dark mountains. As, then, there are shining mountains and dark mountains, so also are there good horses and again bad horses. We have spoken of the bad horses; let us speak also of the good horses. At that time when they came against Elisha to seize him, the servant went out and saw the army of the Assyrians round about, and Elisha said: "Fear not, for there are more with us than with them." And there it is written: "Lord, open the eyes of thy servant, that he may see." And when his eyes were opened, the servant saw the chariots and horses. These were the helpers. See, then, what he says, chariots and horses. There was no man upon them, but there were only chariots and horses. This is what he means to say: the multitude of angels. They themselves were both chariots and horses: but the rider was the Lord. Therefore he says in the canticle of Habakkuk: "And thy riding is salvation." This is said to God. O that we too might be the horses of God, and that God might deign to ride upon us. Those contrary horses, then, slumbered, and their riders.