The first chapter of the biblical book of Ezekiel served as the textual starting point for the merkavah mystics?and hints at an image of God.
Ezekiel's vision of God's chariot became the biblical text most important to Jewish mysticism. The story of the prophet encountering God spawned merkavah mysticism, aptly named for the merkavah or chariot on which Ezekiel rode to the heavens. Followers of this type of mysticism sought to recreate similar experiences and ascend into God's realm.
The following passage is read as the haftorah on the first day of Shavuot. Ezekiel, a priest in the Temple prior to its destruction, is exiled in Babylonia with the rest of the Jews. God appears outside of the land of Israel, yet imagery of the tabernacle and cherubim recall the times of wandering in the desert as well as the splendor of Jerusalem.
Now it came to pass in the thirtieth year, in the fourth month, in the fifth day of the month, as I was among the captives by the river Chebar that the heavens opened, and I saw visions of God. In the fifth day of the month, which was the fifth year of king Jehoiachin's captivity, the word of the Lord came expressly unto Ezekiel the priest, the son of Buzi, in the land of the Chaldeans by the river Chebar. And the hand of the Lord was there upon him.
And I looked, and, behold, a stormy wind came out of the north, a great cloud, with a fire flashing up, so that a brightness was round about it; and out of the midst as the color of electrum, out of the midst of the fire. And out of the midst came the likeness of four living creatures. And this was their appearance: they had the likeness of a man. And every one had four faces, and every one of them had four wings. And their feet were straight feet; and the sole of their feet was like the sole of a calf's foot; and they sparkled like the color of burnished brass. And they had the hands of a man under their wings on their four sides; and as for the faces and wings of them four. Their wings were joined one to another; they turned not when they went; they went every one straight forward.
As for the likeness of their faces, they had the face of a man; and they four had the face of a lion on the right side; and they four had the face of an ox on the left side; they four had also the face of an eagle. Thus were their faces; and their wings were stretched upward; two wings of every one were joined one to another, and two covered their bodies. And they went every one straight forward; whither the spirit was to go, they went; they turned not when they went. As for the likeness of the living creatures, their appearance was like coals of fire, burning like the appearance of torches; it flashed up and down among the living creatures; and there was brightness to the fire, and out of the fire went forth lightning. And the living creatures ran and returned as the appearance of a flash of lightning.