Not in Heaven
A carob tree, a voice from the sky, and how the law gets decided: the oven of Achnai — Part I
Bava Metzia 59a–b · Kelim 5:10 · Deuteronomy 30:12 · Exodus 23:2
A word before we begin. What follows is one reading among many. Some of the people in these stories were great tzaddikim — men and women of a spiritual stature we cannot measure — and the sages who recorded them chose every word with care. We offer an interpretation, based on the text and the classical commentators, the Meforshim; we do not claim to have reached the depth of their thoughts or feelings. Where an essay says "he felt" or "the sages meant," read: "this is how the story, as we understand it, invites us to see them."
לֹא בַשָּׁמַיִם הִוא לֵאמֹר מִי יַעֲלֶה־לָּנוּ הַשָּׁמַיְמָה וְיִקָּחֶהָ לָּנוּ וְיַשְׁמִעֵנוּ אֹתָהּ וְנַעֲשֶׂנָּה
"It is not in heaven, that you should say: Who will go up for us to heaven and take it for us, and let us hear it, that we may do it." (Deuteronomy 30:12)
Who decides what the law is, when both sides are certain?
Every community that outlives its founder meets this question, and most of the answers are bad. Follow the most brilliant man in the room, and the law dies with him. Follow whoever speaks for heaven, and the law belongs to whoever claims the loudest revelation. The Talmud's answer comes in the strangest story it tells, and the story has a date and an address. It happens at Yavneh, the small academy near the coast where the rabbis rebuilt Judaism in the years after Rome burned the Temple, around the year 100. The Temple had been the center: one altar, one court, one place where questions ended. Now there was no Temple, no court in Jerusalem, and a people scattering across an empire. Whatever the sages of Yavneh decided about how decisions get made would either hold that people together or watch it dissolve into sects.¹
The argument that forced the question was, on its face, about kitchenware. An oven had been cut into segments and reassembled with sand between the layers. Rabbi Eliezer ben Hyrcanus, the greatest memory of his generation, held that the oven was broken and therefore could not become ritually impure. The other sages held that it was still an oven. That is the whole dispute. What happened next involves a carob tree, a stream, the walls of the study hall, and a voice from the sky. This essay, the first of two, follows the argument to its famous climax: the day the sages outvoted heaven, and heaven smiled. The second essay follows what that victory cost. The Talmud tells this story inside its discussion of hurting people with words, and it does not end with the smile.
The text
The Mishnah records the dispute in two dry lines: an earthenware oven, cut into rings, sand between the rings; Rabbi Eliezer declares it pure, the sages declare it impure.² The Gemara adds that it was called the oven of akhnai, the snake, because the sages surrounded it with arguments the way a snake coils around its prey. On that day, the Talmud says, Rabbi Eliezer answered every objection in the world, and they did not accept it from him.
So he stopped arguing and called witnesses.
אָמַר לָהֶם: אִם הֲלָכָה כְּמוֹתִי — חָרוּב זֶה יוֹכִיחַ. נֶעֱקַר חָרוּב מִמְּקוֹמוֹ מֵאָה אַמָּה, וְאָמְרִי לַהּ: אַרְבַּע מֵאוֹת אַמָּה. אָמְרוּ לוֹ: אֵין מְבִיאִין רְאָיָה מִן הֶחָרוּב
He said to them: If the halacha is as I say, this carob tree will prove it. The carob tree was uprooted from its place a hundred cubits, and some say four hundred cubits. They said to him: One does not bring proof from a carob tree.
He said: if the halacha is as I say, the stream will prove it, and the stream flowed backward. They said: one does not bring proof from a stream. He said: the walls of the study hall will prove it, and the walls leaned in to fall. Rabbi Yehoshua ben Chananya rebuked the walls: when scholars are contending in halacha, what business is it of yours? Out of respect for Rabbi Yehoshua the walls did not fall, and out of respect for Rabbi Eliezer they did not straighten. They are leaning still.
Then Rabbi Eliezer went over everyone's head.
חָזַר וְאָמַר לָהֶם: אִם הֲלָכָה כְּמוֹתִי — מִן הַשָּׁמַיִם יוֹכִיחוּ. יָצָאתָה בַּת קוֹל וְאָמְרָה: מָה לָכֶם אֵצֶל רַבִּי אֱלִיעֶזֶר, שֶׁהֲלָכָה כְּמוֹתוֹ בְּכׇל מָקוֹם
He said to them again: If the halacha is as I say, from heaven they will prove it. A heavenly voice went out and said: What do you want with Rabbi Eliezer, for the halacha is as he says in every place.
And then the moment the story exists for.
עָמַד רַבִּי יְהוֹשֻׁעַ עַל רַגְלָיו וְאָמַר: ״לֹא בַשָּׁמַיִם הִיא!״
Rabbi Yehoshua stood on his feet and said: "It is not in heaven!"
What does that mean here? Rabbi Yirmeya explains: the Torah was already given at Sinai. We pay no attention to a heavenly voice, because You already wrote, at Sinai, in the Torah itself, "after the majority one must incline" (Exodus 23:2). The Torah was handed over, and the hand-over included the rules for deciding, and the rules say: count the votes. Years later Rabbi Natan met Elijah the prophet and asked him: what did the Holy One do in that hour?
אֲמַר לֵיהּ: קָא חָיֵיךְ וְאָמַר, ״נִצְּחוּנִי בָּנַי! נִצְּחוּנִי בָּנַי!״
He said to him: He smiled and said, "My children have defeated Me! My children have defeated Me!"
There the famous part of the story ends. The rest of that day, and what it set in motion, is the second essay.
The lessons
The whole scene takes ten lines in the Talmud, and it moves so fast that its three turns go by almost unnoticed. It is worth slowing the scene down and asking. Why is a flying carob tree not an argument? Everyone present saw it fly; in any courtroom in the world an uprooted tree would count for something. Why does Rabbi Yehoshua answer a voice from the sky with a verse, and why does the verse win? And what kind of God smiles at being defeated, and says so twice? Each question is one layer of the boldest idea the Talmud ever committed to writing.
1. A miracle is not an argument
Listen to what the sages say each time. They do not say that the carob tree is lying. The tree really flew; the stream really ran backward. They say: one does not bring proof from a carob tree. A proof is the kind of thing that has to convince you, step by step, in the open, where anyone can check the steps. A miracle convinces no one of anything except that the man performing it has power. It overwhelms; it does not explain. The sand either interrupts the oven or it does not, and a tree flying through the air, however far, says nothing about sand.
The Talmud is drawing a line that most of the ancient world did not draw. If wonders could settle law, the law would belong to whoever produced the best wonder. The study hall would become a contest of magicians, which is to say a contest of power. By refusing the carob tree, the sages are saying that the law answers to reasons. And reasons are the one currency every scholar can earn, the poor and unpopular included. Rabbi Eliezer's miracles grow in scale through the scene, from a tree to a stream to the building itself. The answer never changes, because a reason does not become stronger by becoming bigger.
2. The Torah was given, not lent
The heavenly voice is a different challenge. It is not a display of power; it is testimony from the Author, and it says the sages are wrong. Rabbi Yehoshua stands up, which is what one does before giving testimony, and answers heaven out of heaven's own book: it is not in heaven. Rabbi Yirmeya spells out the argument underneath. At Sinai the Torah changed owners. It was given, all of it, including the procedure for resolving disputes about it, and the procedure says to follow the majority. From that moment, even its Author argues from inside the system He handed over. A gift the giver can take back whenever he clears his throat from the sky was never really given. This gift was.
The historical moment explains why the sages needed this idea so badly, and why at Yavneh of all places. A generation earlier, questions could end in Jerusalem. Now the center was ash, and there were sects on every side claiming direct light from heaven. A people about to scatter across an empire could carry a procedure with them anywhere: a study hall, a vote, a majority. It could not carry an oracle. "It is not in heaven" is usually quoted as a declaration of independence, and it is one, but it is also a survival plan. The law that is not in heaven can be in Spain, in Babylonia, in a village with ten scholars, and it was.³
3. The smile
The majority does not win because the majority is right. The story goes out of its way to make this uncomfortable: the heavenly voice says, plainly, that Rabbi Eliezer is right about the oven. The majority wins because the alternative to a procedure is a strongman. The law has decided it would rather sometimes be wrong together than be right at the mercy of whoever hears voices. That trade is the price of having law at all, and the Talmud pays it with open eyes, in the hardest case it could find: a case where the lone voice really was correct and really could prove it.
And God's smile seals the trade. "My children have defeated Me" is not a father losing an argument. It is a father watching his children use, correctly, the very thing he gave them, and use it against him, and being unable to hide his delight. Any teacher knows the moment. The student who can only repeat you has learned nothing; the student who catches you in an error with your own method has finally learned the method. A revelation that could never be argued with would keep its receivers children forever.
This is also the moment the story of Sinai was waiting for. When Moses went up to receive the Torah, the angels argued that it was too precious to leave heaven, and God did not silence them. He made Moses answer them, out of the Torah's own words, and the angels lost. That story is told in the last of the Matan Torah essays on this site. At Yavneh the same test runs in reverse: now that the Torah is on earth, can heaven take a word of it back? The sages answer exactly as Moses answered, from the text itself, and heaven loses again, this time laughing. The smile is the signature on the hand-over: heaven confirming, in the act of losing, that the gift was real, and still is.⁴
Coda
The Talmud says the walls of the study hall are leaning still: too respectful of Rabbi Yehoshua to fall, too respectful of Rabbi Eliezer to stand straight. It is the right monument, because the story is not finished when the smile fades. The sages have won the argument about how arguments are won. That same day they will have to decide what to do with the man they defeated, and everything in the second half of this story burns. The walls lean over both halves. The Talmud framed the whole tale, victory included, inside its laws about hurting people with words, and the reason why is the subject of Part II.
Notes
- Yavneh, near the Mediterranean coast, is where Rabban Yochanan ben Zakkai received Roman permission to establish an academy around the destruction of the Temple in the year 70. Under his successor Rabban Gamliel II, the Nasi (patriarch), Yavneh set the calendar, fixed the daily prayers, and worked to produce one binding law for a people without a Temple. The principals of this story are all of that generation: Rabbi Eliezer ben Hyrcanus and Rabbi Yehoshua ben Chananya were the two senior students of Rabban Yochanan ben Zakkai, and Rabbi Akiva, who enters in Part II, was Rabbi Eliezer's own student. Rabbi Yehoshua is the same sage who answers the Roman emperor about the Shabbat spice elsewhere on this site. This page is also the sequel to the scene on Shabbat 88b–89a, where Moses defends the Torah's descent from heaven against the angels: there heaven's household loses the Torah to earth, and here heaven itself confirms that the loss was final.
- The rule behind the dispute: a whole earthenware vessel can contract ritual impurity; a broken one cannot. Rabbi Eliezer held that an oven cut into rings, with sand between them, is broken, whatever it looks like; the sages held that once it is reassembled and functions as an oven, it is an oven. The Mishnah is in Kelim 5:10. As for the name, the Gemara records two views: that the oven belonged to a man named Achnai, or that akhnai is the snake, for the coil of arguments around it.
- The verse itself, read in full, is about accessibility rather than authority: "It is not in heaven… nor across the sea… rather, the matter is very near to you, in your mouth and in your heart, to do it" (Deuteronomy 30:12–14). The sages read accessibility as authority: what was placed fully in human hands is decided by human hands. The proof text for the majority, "after the majority one must incline" (Exodus 23:2), is likewise read far beyond its plain sense. The sages knew it: the boldness of the readings is part of the point; the method was being used to establish the method.
- The tradition did not find this settlement simple, and left a loose end in plain view: elsewhere (Eruvin 13b) a heavenly voice announces that in the disputes of the houses of Hillel and Shammai "these and those are the words of the living God, and the halacha follows the house of Hillel," and there the voice is accepted. The commentators reconcile the pages in several ways. The simplest reading is that procedure governs the law, while heaven still gets a word in about character, for the house of Hillel earned its majority by being "gentle and humble, and teaching their opponents' words together with their own."