The disastrous result of the war which had been waged against the Romans during a period of four years, the destruction of the State, the burning of the Temple, the condemnation of the prisoners to labor in the lead-works of Egypt, to be sold in the slave-markets, or to become victims in the fights with wild beasts in the arena—all these calamities came with such crushing force on the remaining Jews that they felt utterly at a loss as to what they should do. Judæa was depopulated; all who had taken up arms, whether in northern or southern, whether in cis- or trans-Jordanic Judæa, were either dead or enslaved and banished. The infuriated conquerors had spared neither the women nor the children. The third banishment—the Roman Exile (Galut Edom), under Vespasian and Titus—had commenced amid greater terror and cruelty than the Babylonian Exile under Nebuchadnezzar. Only a few were spared—those who openly or secretly sided with the Romans, partisans of Rome, who, from the very commencement, had been devoid of patriotic feelings; the friends of peace, who thought that Judaism had a different task from that of combating the Romans by force of arms, thoughtful and careful men, who looked upon a contest with Rome as national suicide; and lastly those who, through party strife, had been forced to lay down their arms and to make separate terms with the Romans. This small remnant in the land of Judæa and the Jews of Syria, who had always hoped that Titus would respect the Temple (the center of worship and religion), were moved deeply, and thrown into despair at the destruction of the sanctuary protected by God. Their despair led to various results. Some were driven to lead an ascetic life, to deny themselves meat and wine; others were led thereby to join Christianity, seeking thus to fill the void in their hearts which was caused by the cessation of burnt-offerings. Judaism was threatened by the greatest danger; deprived, as it was, of its support and rallying-point, it appeared in imminent danger of stagnation or of falling to pieces. The communities in Syria, Babylon, and Persia, in Asia Minor, Rome, and in Europe generally, had until now turned their eyes to Jerusalem and the Temple, whence they drew their instructions and laws. The only independent congregation, that of Alexandria, had become helpless through the destruction of the Temple of Onias. What was to be the future of the Jewish nation, of Judaism? The Synhedrion, which had given laws to the entire community, and had regulated its religious life, had disappeared with the fall of Jerusalem. Who would step into the breach, and render a continued existence a possibility? There now appeared a man who seemed made to save the essential doctrines of Judaism, to restore some amount of strength to the nation, so that it might continue to live, and the threatened decay be averted.

This man was Jochanan, the son of Zakkai. He labored, like the prophets during the first exile in Babylon, but by other means, to maintain the life of the Jewish nation; he reanimated its frozen limbs, and infusing fresh energy into its actions, consolidated its dispersed members into one whole. Jochanan, if not a disciple of Hillel, was yet an heir to his mind. For forty years he is said to have been a tradesman. In other cases, too, we shall see that the great leaders in Jewish history did not follow the study of the Law as a means of subsistence or of gain. During the existence of the State, Jochanan sat in the Synhedrion, or taught within the shadow of the Temple: his school at Jerusalem is said to have been an important one. He was the first man who successfully combated the Sadducees, and who knew how to refute their arguments. During the stormy days of the revolution, he, owing to his peaceful character, joined the party of peace, and on several occasions he urged the nation and the Zealots to surrender the town of Jerusalem, and to submit to the Romans. "Why do you desire to destroy the town, and to give up the Temple to the flames?" he would say to the leaders of the revolution.

Notwithstanding the respect in which he was held, his well-meant admonitions were ignored by the Zealots. The spies whom the Roman general placed in the besieged city of Jerusalem, and who reported to him what took place, did not fail to announce that Jochanan belonged to the friends of Rome, and that he counseled the chiefs to make peace. The news from the town was conveyed on small pieces of paper, which were shot on arrows into the Roman camp. Induced either by fear of the Zealots, or by the desire of obtaining a place of safety for the Law, Jochanan formed the idea of taking refuge in the camp of Titus. To depart from the town was, however, very difficult, as the Zealots kept up a constant watch; Jochanan, therefore, aided by a leader of the Zealots, named Ben-Batiach, determined to have himself conveyed out of the town as a corpse. Having been placed in a coffin he was carried out of the city gates, at the hour of sunset, by his pupils Eleazer and Joshua. Titus received the fugitive in a friendly manner, and gave him permission to make some request of him. Jochanan modestly requested that he might be permitted to establish a school at Jamnia (Jabne), where he could give lectures to his pupils. The district in which this town lay belonged to the private domains of the imperial house, to which it had been bequeathed by the last will of Salome, the sister of Herod. Titus had nothing to urge against the harmless wish of Jochanan, for he could not foresee that by this unimportant concession he was enabling Judaism, feeble as it then appeared, to outlive Rome, which was in all its vigor, by thousands of years.

Jochanan settled with his disciples in Jamnia, a city not far from the Mediterranean Sea, and situated between the port Joppa, and the former city of the Philistines, Ashdod. Jochanan was unable to settle down to his occupation for some space of time, during which the bitter strife was raging before the walls of Jerusalem, and within its streets and its Temple. When the news arrived that the city had fallen, and that the Temple was in flames, Jochanan and his disciples mourned and wailed as if they had lost a dear relative through death. Jochanan, however, unlike his followers, did not despair, for he recognized the truth that Judaism was not indissolubly bound up with its Temple and its altar. He rather consoled his mourning disciples for the loss of the place of expiation with the fitting remark that charity and love of mankind would take the place of burnt-offerings, as it is said in the Bible—"for I take pleasure in mercy and not in burnt-offerings." This liberal view of the value of burnt-offerings made it clear, however, that it was absolutely necessary for a fresh center to be established in lieu of the Temple. Jochanan therefore formed a sort of Synhedrion in Jabne, of which he was at once recognized as the President. The newly created Synhedrion was certainly not composed of seventy members, and no doubt had a totally different sphere of action from the one in Jerusalem, which during the revolution had exercised control over the most important political events. The Synhedrion of Jamnia in the first place gave to its founder plenary power in all religious matters such as the Council had possessed in Jerusalem, and with this were connected the judicial functions of a supreme court. It was only by unbounded authority that Jochanan could compass the formation and consolidation of a Synhedrion, under the unfavorable conditions of the time. Jochanan had to oppose the general opinion that the Synhedrion as a body should have control only in the hewn-stone hall of the Temple, and that outside this spot it lost its judicial character and ceased to be the representative of the nation. When, therefore, Jochanan dissociated the functions of the Synhedrion from the site of the Temple, and removed it to Jabne, he had actually released Judaism from the observance of the rite of burnt-offerings, and rendered it independent. Without any opposition whatsoever, Jabne by this means took the place of Jerusalem, and became the religious national center for the dispersed community. The important functions of the Synhedrion, by which it exercised a judicial and uniting power over the distant congregations, such as the fixing of the time for the new moon and the festivals, proceeded from Jabne. It enjoyed some of the religious privileges of the Holy City. The Synhedrion now bore the name of the Beth-Din (Court of Justice)—the President was called Rosh-beth-din, and was honored by the title of Rabban (general teacher). Jochanan gave over to the Court of Justice the supervision of arrangements for the calendar, which had formerly been one of the offices of the President. By this means the watchers who were looking out for the reappearance of the new moon needed no longer follow the President about in order to give him the information, but had only to attend the sittings of the assembly. This change was an important step, as it rendered the Synhedrion independent of the person of its President.

Jochanan made altogether nine changes, most of which affected such arrangements as had been rendered valueless through the destruction of the Temple. He, however, retained various religious customs as a remembrance of the Temple. He promoted the continuance and preservation of Judaism through the renewal of the study of the Law, and thus rendered firmer the weakened foundations of Jewish communal life. The school at Jabne he influenced through his disciples, whom he imbued with his spirit and his learning. Five of his distinguished pupils are known to us by name, but only three of them won lasting renown—Eliezer, and Joshua (who had carried Jochanan in a coffin out of Jerusalem), and also Eleazer ben Arach. The latter was the most eminent and important amongst them, and of him it was said, "If weighed in the scale, he would outweigh all his fellow-scholars." Jochanan loved to incite them to independent thought by deep-reaching questions. Thus he gave them as a theme for thought, "What should man endeavor most eagerly to obtain?" The one answered "a genial manner," the other "a noble friend," a third "a noble neighbor," the fourth "the gift of knowing in advance the result of his actions." Eleazer answered that "man's best possession is a noble heart." This remark won the approval of his master; it was an answer after his own mind, for in it all else was included.

What was the character of the teachings which Jochanan imparted to his pupils in the school? Hillel, the most respected of the teachers of the Law, the highly-honored ideal in times to come, had given to Judaism a special garb and form, or rather had given it the character of the Law, which had always been peculiar to it. He was the first to develop and confirm a special theory, a sort of Jewish theology or nomology (science of religious laws). He was the founder of Talmudic Judaism. From the midst of contending parties, which were tearing one another to pieces, Hillel had drawn the Law into the quiet precincts of the school-house, and had endeavored to bring into harmony those precepts which were apparently opposed to the Law. Those which had been considered as only customary and traditional were regarded as human laws, and were looked upon by the Sadducees as innovations. Hillel had shown these to be of Biblical origin. His seven explanatory rules, or laws of interpretation, had on the one hand confirmed the laws which had been introduced by the Sopheric and Pharisaic teachers, and on the other hand had given them new scope to develop.

The written Law (that of the Pentateuch) and the oral Law (the Sopheric) from his time ceased to be two widely sundered branches, but were brought into close relations with each other, although the new rendering certainly did violence to the words of Scripture. But as the text was explained, not on a philological basis, but in order to elucidate the laws, it was not possible to keep simply to the written words; it was necessary to interpret them so as to render them suited to the new conditions of life. Under the term Oral Law was included everything which had been handed down from the Fathers, and it formed to a certain extent a hereditary law. The various restrictions which the Sopheric teachers had placed around the Law, the legal decisions which had been introduced by the Synhedrion, the customs which had been observed from generation to generation, the extensions deduced from meager verses of the Pentateuch, all these elements were not written down, but were committed to memory. They were put into the form of short sentences, called "Halacha." They were not arranged or classified according to subjects, but were strung together without connection, or handed down separately, sometimes joined to the name of the authority from whom they were derived. A marvelous memory was needed to retain these Halachas or oral teachings. Jochanan ben Zakkai was the man who best knew these laws. He handed them down to his pupils, and pointed out to them their connection with the written law; he showed them how to draw deductions therefrom, the laws handed down being the material, and their mode of treatment the form. These deductions were obtained by two methods, the one showing how the ordinances of the Law were to be obtained from the words of Scripture (Midrash), and the other served to apply the oral Law to new questions as they arose (Talmud). Thus a fruitful field for the extension of the Law and for ingenious combinations was opened, which was later on freely cultivated. Jochanan ben Zakkai, however, thought much more of the material of the Law than of its form.

He taught not only those doctrines of Judaism which appertained to the Law, but also those portions of the Holy Scriptures which had no direct bearing on the Law. He gave lectures on the writings of the prophets and historians in the form of discourses, which had for some time past been in use both in and out of the synagogue. These lectures were either edifying, comforting, or bitter, sharp, and ironical, and applied the words of the prophets about Edom and Esau, to hated Rome and its tyranny. This kind of exposition of Scripture had a name, "Agada" or "Hagadah." Its chief subjects consisted in explaining historical events, prophetic utterances, and in bringing to mind the past, and treating of the future of Judaism. The Agada investigated the meaning of the Law, examined into the general moral truths of Judaism, deftly united the present with the past, and shadowed the present conditions of life in past experiences. The Halacha forms the chief trunk of the Law, the Midrash the suckling roots, which drew their nourishment from the words of Scripture. The Talmud formed the wide-spreading branches, and the Agada was the blossom which scented and colored the simple fabric of the laws.

In his Agadic dissertations Jochanan endeavored to illuminate the ordinances of the Law by the light of the understanding, and to combine them into general truths, but in a clear and simple manner, utterly dissimilar from the exaggerated method of the Alexandrian-Jewish teachers, who endeavored to extract the dazzling light of the Grecian mode of thought from Holy Writ.

Amongst other things, Jochanan explained very quaintly why the use of iron is forbidden in erecting an altar. Iron is the symbol of war and dissension; the altar, on the contrary, is the symbol of peace and atonement; therefore iron must be kept away from the altar. He deduced therefrom the high value of peace, the advantages of peace between man and wife, between one city and another, and between one nation and another. These were the principles which had induced him to side with the Romans against the revolutionaries. In this way he explained various laws, and rendered them comprehensible, when they seemed obscure or in any way extraordinary. Jochanan was wont to hold converse also with Pagans who had knowledge of the Jewish Law, either from the Greek translation or from their intercourse with the Jews, refuting the objections which they raised, and dispelling or making clear by suitable comparisons the peculiarities which occur in the Holy Writings.