(ו) יְהוֹשֻׁעַ בֶּן פְּרַחְיָה וְנִתַּאי הָאַרְבֵּלִי קִבְּלוּ מֵהֶם. יְהוֹשֻׁעַ בֶּן פְּרַחְיָה אוֹמֵר, עֲשֵׂה לְךָ רַב, וּקְנֵה לְךָ חָבֵר, וֶהֱוֵי דָן אֶת כָּל הָאָדָם לְכַף זְכוּת:
(6) Joshua ben Perahiah and Nittai the Arbelite received [the oral tradition] from them. Joshua ben Perahiah used to say: appoint for thyself a teacher, and acquire for thyself a companion and judge all men with the scale weighted in his favor.
(י) וְעָשִׂ֗יתָ עַל־פִּ֤י הַדָּבָר֙ אֲשֶׁ֣ר יַגִּ֣ידֽוּ לְךָ֔ מִן־הַמָּק֣וֹם הַה֔וּא אֲשֶׁ֖ר יִבְחַ֣ר יְהוָ֑ה וְשָׁמַרְתָּ֣ לַעֲשׂ֔וֹת כְּכֹ֖ל אֲשֶׁ֥ר יוֹרֽוּךָ׃ (יא) עַל־פִּ֨י הַתּוֹרָ֜ה אֲשֶׁ֣ר יוֹר֗וּךָ וְעַל־הַמִּשְׁפָּ֛ט אֲשֶׁר־יֹאמְר֥וּ לְךָ֖ תַּעֲשֶׂ֑ה לֹ֣א תָס֗וּר מִן־הַדָּבָ֛ר אֲשֶׁר־יַגִּ֥ידֽוּ לְךָ֖ יָמִ֥ין וּשְׂמֹֽאל׃
(10) you shall carry out the verdict that is announced to you from that place that the LORD chose, observing scrupulously all their instructions to you. (11) You shall act in accordance with the instructions given you and the ruling handed down to you; you must not deviate from the verdict that they announce to you either to the right or to the left.
מַאי מְבָרֵךְ? — מְבָרֵךְ: ״אֲשֶׁר קִדְּשָׁנוּ בְּמִצְוֹתָיו וְצִוָּנוּ לְהַדְלִיק נֵר שֶׁל חֲנוּכָּה״. וְהֵיכָן צִוָּנוּ? רַב אַוְיָא אָמַר: מִ״לֹּא תָסוּר״. רַב נְחֶמְיָה אָמַר: ״שְׁאַל אָבִיךָ וְיַגֵּדְךָ זְקֵנֶיךָ וְיֹאמְרוּ לָךְ״.
And what blessing does one recite? He recites: Who has made us holy through His commandments and has commanded us to light the Hanukkah light. The Gemara asks: And where did He command us? The mitzva of Hanukkah is not mentioned in the Torah, so how is it possible to say that it was commanded to us by God? The Gemara answers that Rav Avya said: The obligation to recite this blessing is derived from the verse: “You shall not turn aside from the sentence which they shall declare unto you, to the right, nor to the left” (Deuteronomy 17:11). From this verse, the mitzva incumbent upon all of Israel to heed the statements and decrees of the Sages is derived. Therefore, one who fulfills their directives fulfills a divine commandment. Rav Neḥemya said that the mitzva to heed the voice of the Elders of Israel is derived from the verse: “Ask your father, and he will declare unto you, your Elders, and they will tell you” (Deuteronomy 32:7).
(ב) לֹֽא־תִהְיֶ֥ה אַחֲרֵֽי־רַבִּ֖ים לְרָעֹ֑ת וְלֹא־תַעֲנֶ֣ה עַל־רִ֗ב לִנְטֹ֛ת אַחֲרֵ֥י רַבִּ֖ים לְהַטֹּֽת׃
(2) You shall neither side with the mighty to do wrong—you shall not give perverse testimony in a dispute so as to pervert it in favor of the mighty—
עמד רבי יהושע על רגליו ואמר (דברים ל, יב) לא בשמים היא מאי לא בשמים היא אמר רבי ירמיה שכבר נתנה תורה מהר סיני אין אנו משגיחין בבת קול שכבר כתבת בהר סיני בתורה (שמות כג, ב) אחרי רבים להטות אשכחיה רבי נתן לאליהו א"ל מאי עביד קוב"ה בההיא שעתא א"ל קא חייך ואמר נצחוני בני נצחוני בני
Rabbi Yehoshua stood on his feet and said: It is written: “It is not in heaven” (Deuteronomy 30:12). The Gemara asks: What is the relevance of the phrase “It is not in heaven” in this context? Rabbi Yirmeya says: Since the Torah was already given at Mount Sinai, we do not regard a Divine Voice, as You already wrote at Mount Sinai, in the Torah: “After a majority to incline” (Exodus 23:2). Since the majority of Rabbis disagreed with Rabbi Eliezer’s opinion, the halakha is not ruled in accordance with his opinion. The Gemara relates: Years after, Rabbi Natan encountered Elijah the prophet and said to him: What did the Holy One, Blessed be He, do at that time, when Rabbi Yehoshua issued his declaration? Elijah said to him: The Holy One, Blessed be He, smiled and said: My children have triumphed over Me; My children have triumphed over Me.
ולידרוש להו דהא שמואל כרבי שמעון סבירא ליה אתריה דרב הוה
The Gemara asks: Let him indeed teach this ruling to them, for Shmuel holds that the halakha is in accordance with the opinion of Rabbi Shimon, as was previously mentioned. As such, why did he not publicize his opinion on the matter? The Gemara answers: It was Rav’s locale, and therefore it would not be appropriate for Shmuel to publicly present a position with which Rav did not agree. However, when he saw the merchants raising their prices in an unfair manner, he nevertheless threatened to make his opinion on the matter public.
ילתא אייתא דמא לקמיה דרבה בר בר חנה וטמי לה הדר אייתא לקמיה דרב יצחק בריה דרב יהודה ודכי לה והיכי עביד הכי והתניא חכם שטימא אין חברו רשאי לטהר אסר אין חבירו רשאי להתיר מעיקרא טמויי הוה מטמי לה כיון דא"ל דכל יומא הוה מדכי לי כי האי גונא והאידנא הוא דחש בעיניה דכי לה ומי מהימני אין והתניא נאמנת אשה לומר כזה ראיתי ואבדתיו
§ The Gemara relates that Yalta, Rav Naḥman’s wife, brought blood before Rabba bar bar Ḥana, and he deemed her ritually impure. She then brought it before Rav Yitzḥak, son of Rav Yehuda, and he deemed her pure. The Gemara asks: But how could Rav Yitzḥak, son of Rav Yehuda, act in this manner? But isn’t it taught in a baraita: In the case of a halakhic authority who deemed an item impure, another halakhic authority is not allowed to deem it pure; if one halakhic authority deemed a matter prohibited, another halakhic authority is not allowed to deem it permitted? The Gemara explains that initially Rav Yitzḥak, son of Rav Yehuda, deemed her impure, but he changed his mind when Yalta said to him: Every day that I bring blood of this kind of color to Rabba bar bar Ḥana he deems me pure, and specifically now he issued a different ruling, as he feels pain in his eye. Upon hearing this, Rav Yitzḥak, son of Rav Yehuda, deemed her pure. The Gemara asks: But are people deemed credible to present claims such as the one presented by Yalta? The Gemara answers: Yes; and likewise it is taught in a baraita: A woman is deemed credible if she says: I saw blood like this color, but I lost it before it could be examined.
(ה) זִכָּר֞וֹן לִבְנֵ֣י יִשְׂרָאֵ֗ל לְ֠מַעַן אֲשֶׁ֨ר לֹֽא־יִקְרַ֜ב אִ֣ישׁ זָ֗ר אֲ֠שֶׁר לֹ֣א מִזֶּ֤רַע אַהֲרֹן֙ ה֔וּא לְהַקְטִ֥יר קְטֹ֖רֶת לִפְנֵ֣י יְהוָ֑ה וְלֹֽא־יִהְיֶ֤ה כְקֹ֙רַח֙ וְכַ֣עֲדָת֔וֹ כַּאֲשֶׁ֨ר דִּבֶּ֧ר יְהוָ֛ה בְּיַד־מֹשֶׁ֖ה לֽוֹ׃
(5) as the LORD had ordered him through Moses. It was to be a reminder to the Israelites, so that no outsider—one not of Aaron’s offspring—should presume to offer incense before the LORD and suffer the fate of Korah and his band.
When in the once-upon-a-time mythic past halakhah was allowed to be the local province of local, implicitly-bounded geographies, and of local, network-bounded systems of responsa, the coursing of halakhic ideas and changes lived in an ecosystem totally different than ours. Now, Facebook posts and social media and demographic surveys invariably influence who we think is doing 'right' and 'wrong' by halakhic change and halakhic performance. Yehuda Kurtzer, May 18, 2020.