The baraita continues: On Shavuot they read the portion of “Seven weeks,” and they read as the haftara from Habakkuk, chapter 2, since it mentions the giving of the Torah at Sinai. Others say: They read the portion of “In the third month” (Exodus 19:1–20:23), which describes the giving of the Torah, and they read as the haftara from the account of the Divine Chariot (Ezekiel 1). The Gemara comments: And nowadays, in the Diaspora, when there are two days of Shavuot, we act in accordance with both opinions, but in the reverse order. On the first day they read the portion of “In the third month,” and on the second day they read the portion of “Seven weeks.”

(1) In the thirtieth year, on the fifth day of the fourth month, when I was in the community of exiles by the Chebar Canal, the heavens opened and I saw visions of God. (2) (On the fifth day of the month—it was the fifth year of the exile of King Jehoiachin—(3) the word of GOD came to the priest Ezekiel son of Buzi, by the Chebar Canal, in the land of the Chaldeans. And the hand of GOD came upon him there.)(4) I looked, and lo, a stormy wind came sweeping out of the north—a huge cloud and flashing fire, surrounded by a radiance; and in the center of it, in the center of the fire, a gleam as of amber. (5) In the center of it were also the figures of four creatures. And this was their appearance:
They had the figures of human beings.(6) However, each had four faces, and each of them had four wings; (7) the legs of each were [fused into] a single rigid leg, and the feet of each were like a single calf’s hoof; and their sparkle was like the luster of burnished bronze. (8) They had human hands below their wings. The four of them had their faces and their wings on their four sides.(9) Each one’s wings touched those of the other. They did not turn when they moved; each could move in the direction of any of its faces.(10) Each of them had a human face [at the front]; each of the four had the face of a lion on the right; each of the four had the face of an ox on the left; and each of the four had the face of an eagle [at the back].(11) Such were their faces. As for their wings, they were separated: above, each had two touching those of the others, while the other two covered its body. (12) And each could move in the direction of any of its faces; they went wherever the spirit impelled them to go, without turning when they moved.(13) Such then was the appearance of the creatures. With them was something that looked like burning coals of fire. This fire, suggestive of torches, kept moving about among the creatures; the fire had a radiance, and lightning issued from the fire. (14) Dashing to and fro [among] the creatures was something that looked like flares. (15) As I gazed on the creatures, I saw one wheel on the ground next to each of the four-faced creatures. (16) As for the appearance and structure of the wheels, they gleamed like beryl. All four had the same form; the appearance and structure of each was as of two wheels cutting through each other. (17) And when they moved, each could move in the direction of any of its four quarters; they did not veer when they moved. (18) Their rims were tall and frightening, for the rims of all four were covered all over with eyes. (19) And when the creatures moved forward, the wheels moved at their sides; and when the creatures were borne above the earth, the wheels were borne too. (20) Wherever the spirit impelled them to go, they went—wherever the spirit impelled them—and the wheels were borne alongside them; for the spirit of the creatures was in the wheels. (21) When those moved, these moved; and when those stood still, these stood still; and when those were borne above the earth, the wheels were borne alongside them—for the spirit of the creatures was in the wheels.(22) Above the heads of the creatures was a form: an expanse, with an awe-inspiring gleam as of crystal, was spread out above their heads. (23) Under the expanse, each had one pair of wings extended toward those of the others; and each had another pair covering its body. (24) When they moved, I could hear the sound of their wings like the sound of mighty waters, like the sound of Shaddai, a tumult like the din of an army. When they stood still, they would let their wings droop. (25) From above the expanse over their heads came a sound. When they stood still, they would let their wings droop.(26) Above the expanse over their heads was the semblance of a throne, in appearance like sapphire; and on top, upon this semblance of a throne, there was the semblance of a human form. (27) From what appeared as the loins up, I saw a gleam as of amber—what looked like a fire encased in a frame; and from what appeared as the loins down, I saw what looked like fire. There was a surrounding radiance. (28) Like the appearance of the bow that shines in the clouds on a day of rain, such was the appearance of the surrounding radiance. That was the appearance of the semblance of the Presence of GOD. When I beheld it, I flung myself down on my face. And I heard the voice of someone speaking.

One may not expound the topic of forbidden sexual relations before three or more individuals; nor may one expound the act of Creation and the secrets of the beginning of the world before two or more individuals; nor may one expound by oneself the Design of the Divine Chariot, a mystical teaching with regard to the ways God conducts the world, unless he is wise and understands most matters on his own. The mishna continues in the same vein: Whoever looks at four matters, it would have been better for him had he never entered the world: Anyone who reflects upon what is above the firmament and what is below the earth, what was before Creation, and what will be after the end of the world. And anyone who has no concern for the honor of his Maker, who inquires into and deals with matters not permitted to him, deserves to have never come to the world.

ולא במעשה מרכבה – that Ezekiel saw and that Isaiah saw. And Maimonides explained, that the event of Creation, the natural wisdom, and the episode of the Chariot, which is the reality of God and his attributes, and the angels and the soul and the intellect/intuition, and what will be after death. But it does not appear to me that all of this will be called the episode of the Chariot, for if so, the wisdom of the chariot he (i.e., the Tanna of our Mishnah) should have taught, but the event of the Chariot is that via the mention of the names of holiness, we make use of the crown, and we look out how the angelic watches while they at their prayer meetings, and how the hall containing the golden altar is inside from the hall containing the golden altar, such as those who foresee the Holy Spirit.

What is the difference between the subject matter of Ma'aseh Merkavah and the subject matter of Ma'aseh Bereshit? The subject matter of Ma'aseh Merkavah should never be expounded upon - even to a single individual - unless he is wise and already understand from his knowledge, [in which instance,] he is given chapter headings.

[In contrast,] the subject matter of Ma'aseh Bereshit may be taught to an individual even though he is incapable of comprehending it with his own powers of understanding [alone]. He may be informed about everything that he can possibly know about these matters. Why are they not taught publicly? Because not every person has the vast knowledge necessary to grasp the interpretation and the explanation of these matters in a complete manner.

§ The Gemara returns to the topic of the Design of the Divine Chariot. The Sages taught: An incident occurred involving Rabban Yoḥanan ben Zakkai, who was riding on a donkey and was traveling along the way, and his student, Rabbi Elazar ben Arakh, was riding a donkey behind him. Rabbi Elazar said to him: My teacher, teach me one chapter in the Design of the Divine Chariot. He said to him: Have I not taught you: And one may not expound the Design of the Divine Chariot to an individual, unless he is a Sage who understands on his own accord? Rabbi Elazar said to him: My teacher, allow me to say before you one thing that you taught me. In other words, he humbly requested to recite before him his own understanding of this issue. He said to him: Speak.

Immediately, Rabban Yoḥanan ben Zakkai alighted from the donkey, and wrapped his head in his cloak in a manner of reverence, and sat on a stone under an olive tree. Rabbi Elazar said to him: My teacher, for what reason did you alight from the donkey? He said: Is it possible that while you are expounding the Design of the Divine Chariot, and the Divine Presence is with us, and the ministering angels are accompanying us, that I should ride on a donkey? Immediately, Rabbi Elazar ben Arakh began to discuss the Design of the Divine Chariot and expounded, and fire descended from heaven and encircled all the trees in the field, and all the trees began reciting song.

What song did they recite? “Praise the Lord from the earth, sea monsters and all depths…fruit trees and all cedars…praise the Lord” (Psalms 148:7–14). An angel responded from the fire, saying: This is the very Design of the Divine Chariot, just as you expounded. Rabban Yoḥanan ben Zakkai stood and kissed Rabbi Elazar ben Arakh on his head, and said: Blessed be God, Lord of Israel, who gave our father Abraham a son like you, who knows how to understand, investigate, and expound the Design of the Divine Chariot. There are some who expound the Torah’s verses well but do not fulfill its imperatives well, and there are some who fulfill its imperatives well but do not expound its verses well, whereas you expound its verses well and fulfill its imperatives well. Happy are you, our father Abraham, that Elazar ben Arakh came from your loins.

The Gemara relates: And when these matters, this story involving his colleague Rabbi Elazar ben Arakh, were recounted before Rabbi Yehoshua, he was walking along the way with Rabbi Yosei the Priest. They said: We too shall expound the Design of the Divine Chariot. Rabbi Yehoshua began expounding. And that was the day of the summer solstice, when there are no clouds in the sky. Yet the heavens became filled with clouds, and there was the appearance of a kind of rainbow in a cloud. And ministering angels gathered and came to listen, like people gathering and coming to see the rejoicing of a bridegroom and bride.

Rabbi Yosei the Priest went and recited these matters before Rabban Yoḥanan ben Zakkai, who said to him: Happy are all of you, and happy are the mothers who gave birth to you; happy are my eyes that saw this, students such as these. As for you and I, I saw in my dream that we were seated at Mount Sinai, and a Divine Voice came to us from heaven: Ascend here, ascend here, for large halls [teraklin] and pleasant couches are made up for you. You, your students, and the students of your students are invited to the third group, those who will merit to welcome the Divine Presence.

§ The Sages taught: Four entered the orchard [pardes], i.e., dealt with the loftiest secrets of Torah, and they are as follows: Ben Azzai; and ben Zoma; Aḥer, the other, a name for Elisha ben Avuya; and Rabbi Akiva. Rabbi Akiva, the senior among them, said to them: When, upon your arrival in the upper worlds, you reach pure marble stones, do not say: Water, water, although they appear to be water, because it is stated: “He who speaks falsehood shall not be established before My eyes” (Psalms 101:7).

The Gemara proceeds to relate what happened to each of them: Ben Azzai glimpsed at the Divine Presence and died. And with regard to him the verse states: “Precious in the eyes of the Lord is the death of His pious ones” (Psalms 116:15). Ben Zoma glimpsed at the Divine Presence and was harmed, i.e., he lost his mind. And with regard to him the verse states: “Have you found honey? Eat as much as is sufficient for you, lest you become full from it and vomit it” (Proverbs 25:16). Aḥer chopped down the shoots of saplings. In other words, he became a heretic. Rabbi Akiva came out safely.

(1) (1) One may not expound upon the subject of forbidden relations but they may expound before two. They may not expound concerning the Work of Creation before two but they may expound before one. They may not expound on the [Work of] the Chariot before one unless he is wise and understands of his own accord. A story of R. Yochanan ben Zaccai who was riding on his donkey and Rabbi Ele'azar ben Arakh was riding behind him. He said to him: "Rabbi, teach me one paragraph concerning the Work of the Chariot. He said to him: "No. Have I not said to you from the beginning that one does not teach concerning the [Work of] the Chariot before one unless he is wise and understands of his own accord? He said to him: "Now give me permission to expound before you." He said to him: "Speak!" Rabbi Ele'azar ben Arakh began to expound on the Work of the Chariot. Rabbi Yochanan ben Zaccai alighted from his donkey and wrapped himself in his tallit and the two of them sat on an outcropping of rock under an olive tree and he presented the subject before him. Rabbi Yochanan stood up and kissed him and said: "Blessed is Adonai, God of Israel, who gave a son to Abraham our father that knows and understands how to expound on the glory of our Father in Heaven! There are those suited to expound and who are not suited to fulfill, those who are suited to fulfill and who are not suited to expound. Ele'azar ben Arakh is suited to expound and to fulfill. Happy is Abraham our father, that Ele'azar ben Arakh, who came forth from your loins, knows and understands well enough to expound on the glory of our Father in heaven! Rabbi Yosi bar R. Yehuda says: "Rabbi Yehoshua expounded before R. Yochanan ben Zaccai, Rabbi Akiva expounded before Rabbi Yehoshua and Hananiah ben Chachinai expounded before before Rabbi Akiva.

One may not conclude the Torah reading with by reading from the Prophets the account of the Divine Chariot (Ezekiel, chapter 1), so as not to publicize that which was meant to remain hidden. And Rabbi Yehuda permits it. Rabbi Eliezer says: One may not conclude with section from the Prophets beginning with: “Make known to Jerusalem her abominations” (Ezekiel 16:2), because it speaks derogatively of the Jewish people.