The Gemara cites other expositions that deal with Torah study. Rabbi Ḥama, son of Rabbi Ḥanina, said: What is the meaning of that which is written: “Iron sharpens iron, so a man sharpens the countenance of his friend” (Proverbs 27:17)? This verse comes to tell you that just as with these iron implements, one sharpens the other when they are rubbed against each other, so too, when Torah scholars study together, they sharpen one another in halakha. Rabba bar bar Ḥana said: Why are matters of Torah compared to fire, as it is stated: “Is not My word like fire, says the Lord” (Jeremiah 23:29)? To tell you: Just as fire does not ignite in a lone stick of wood but in a pile of kindling, so too, matters of Torah are not retained and understood properly by a lone scholar who studies by himself, but by a group of Sages. And this is what Rabbi Yosei bar Ḥanina said: What is the meaning of that which is written: “A sword is upon the boasters [habaddim], and they shall become fools [noalu]” (Jeremiah 50:36)? This verse can be interpreted homiletically: There is a sword upon the enemies of Torah scholars, a euphemism for Torah scholars themselves, who sit alone [bad bevad] and study Torah. And not only that, but those who study by themselves grow foolish from their solitary Torah study, as it is stated: “And they shall become fools.”

(17) Every dispute that is for the sake of Heaven, will in the end endure; But one that is not for the sake of Heaven, will not endure. Which is the controversy that is for the sake of Heaven? Such was the controversy of Hillel and Shammai. And which is the controversy that is not for the sake of Heaven? Such was the controversy of Korah and all his congregation.

§ The Gemara returns to the initial question of whether or not Beit Shammai acted in accordance with their own opinion. The Gemara suggests: Come and hear: Although Beit Shammai and Beit Hillel disagreed with regard to several cases, nevertheless, they did not refrain from marrying women from each other’s communities. The cases with regard to which they disagreed include rival wives, and sisters, i.e., if two sisters had been married to two brothers and simultaneously became obligated in levirate marriage, Beit Hillel prohibit both in levirate marriage, and if they violated the prohibition and married regardless, they require a divorce. By contrast, Beit Shammai permit them to remain married. Furthermore, Beit Shammai and Beit Hillel disagreed with regard to an outdated bill of divorce that had been written but not delivered. Beit Shammai maintain that if the husband and wife continued to live together after the writing of the bill of divorce, the same bill of divorce can still be used later, whereas Beit Hillel dispute this. And they likewise disagreed with regard to an uncertain married woman, i.e., whether a minor who was actually married, and not merely betrothed, may perform refusal. And they also disagreed with regard to one who divorces his wife and later she lodged together with him at an inn, as to whether or not this is sufficient grounds for assuming that they remarried. Additionally, they disagreed with regard to the issue of betrothal by money and with the equivalent value of money, and by a peruta or with the equivalent value of a peruta. According to Beit Shammai, the minimal amount of money effective for betrothal is a dinar or the equivalent of a dinar, whereas Beit Hillel maintain that even the less valuable peruta or its equivalent is sufficient. Despite the fact that these halakhot entail important ramifications depending on whether or not these women were married or fit for marriage, or whether their offspring are fit for marriage, Beit Shammai did not refrain from marrying women from Beit Hillel, nor did Beit Hillel refrain from marrying women from Beit Shammai. This serves to teach you that they practiced affection and camaraderie between them, to fulfill that which is stated: “Love truth and peace” (Zechariah 8:19). Rabbi Shimon says: They did refrain in the certain cases, but they did not refrain in the uncertain cases. In other words, Beit Hillel were not worried that any ordinary woman from Beit Shammai might be one of those of uncertain status.

Rabbi Abba said that Shmuel said: For three years Beit Shammai and Beit Hillel disagreed. These said: The halakha is in accordance with our opinion, and these said: The halakha is in accordance with our opinion. Ultimately, a Divine Voice emerged and proclaimed: Both these and those are the words of the living God. However, the halakha is in accordance with the opinion of Beit Hillel. The Gemara asks: Since both these and those are the words of the living God, why were Beit Hillel privileged to have the halakha established in accordance with their opinion? The reason is that they were agreeable and forbearing, showing restraint when affronted, and when they taught the halakha they would teach both their own statements and the statements of Beit Shammai. Moreover, when they formulated their teachings and cited a dispute, they prioritized the statements of Beit Shammai to their own statements, in deference to Beit Shammai...

The Gemara relates: One day, Rabbi Yoḥanan was bathing in the Jordan River. Reish Lakish saw him and jumped into the Jordan, pursuing him. At that time, Reish Lakish was the leader of a band of marauders. Rabbi Yoḥanan said to Reish Lakish: Your strength is fit for Torah study. Reish Lakish said to him: Your beauty is fit for women. Rabbi Yoḥanan said to him: If you return to the pursuit of Torah, I will give you my sister in marriage, who is more beautiful than I am. Reish Lakish accepted upon himself to study Torah. Subsequently, Reish Lakish wanted to jump back out of the river to bring back his clothes, but he was unable to return, as he had lost his physical strength as soon as he accepted the responsibility to study Torah upon himself. Rabbi Yoḥanan taught Reish Lakish Bible, and taught him Mishna, and turned him into a great man. Eventually, Reish Lakish became one of the outstanding Torah scholars of his generation. One day the Sages of the study hall were engaging in a dispute concerning the following baraita: With regard to the sword, the knife, the dagger [vehapigyon], the spear, a hand sickle, and a harvest sickle, from when are they susceptible to ritual impurity? The baraita answers: It is from the time of the completion of their manufacture, which is the halakha with regard to metal vessels in general. These Sages inquired: And when is the completion of their manufacture? Rabbi Yoḥanan says: It is from when one fires these items in the furnace. Reish Lakish said: It is from when one scours them in water, after they have been fired in the furnace. Rabbi Yoḥanan said to Reish Lakish: A bandit knows about his banditry, i.e., you are an expert in weaponry because you were a bandit in your youth. Reish Lakish said to Rabbi Yoḥanan: What benefit did you provide me by bringing me close to Torah? There, among the bandits, they called me: Leader of the bandits, and here, too, they call me: Leader of the bandits. Rabbi Yoḥanan said to him: I provided benefit to you, as I brought you close to God, under the wings of the Divine Presence. As a result of the quarrel, Rabbi Yoḥanan was offended, which in turn affected Reish Lakish, who fell ill. Rabbi Yoḥanan’s sister, who was Reish Lakish’s wife, came crying to Rabbi Yoḥanan, begging that he pray for Reish Lakish’s recovery. She said to him: Do this for the sake of my children, so that they should have a father. Rabbi Yoḥanan said to her the verse: “Leave your fatherless children, I will rear them” (Jeremiah 49:11), i.e., I will take care of them. She said to him: Do so for the sake of my widowhood. He said to her the rest of the verse: “And let your widows trust in Me.” Ultimately, Rabbi Shimon ben Lakish, Reish Lakish, died. Rabbi Yoḥanan was sorely pained over losing him. The Rabbis said: Who will go to calm Rabbi Yoḥanan’s mind and comfort him over his loss? They said: Let Rabbi Elazar ben Pedat go, as his statements are sharp, i.e., he is clever and will be able to serve as a substitute for Reish Lakish. Rabbi Elazar ben Pedat went and sat before Rabbi Yoḥanan. With regard to every matter that Rabbi Yoḥanan would say, Rabbi Elazar ben Pedat would say to him: There is a ruling which is taught in a baraita that supports your opinion. Rabbi Yoḥanan said to him: Are you comparable to the son of Lakish? In my discussions with the son of Lakish, when I would state a matter, he would raise twenty-four difficulties against me in an attempt to disprove my claim, and I would answer him with twenty-four answers, and the halakha by itself would become broadened and clarified. And yet you say to me: There is a ruling which is taught in a baraita that supports your opinion. Do I not know that what I say is good? Being rebutted by Reish Lakish served a purpose; your bringing proof to my statements does not. Rabbi Yoḥanan went around, rending his clothing, weeping and saying: Where are you, son of Lakish? Where are you, son of Lakish? Rabbi Yoḥanan screamed until his mind was taken from him, i.e., he went insane. The Rabbis prayed and requested for God to have mercy on him and take his soul, and Rabbi Yoḥanan died.