The Talmud requires that wherever twelve adults reside together in one place, they shall erect a synagogue and serve the God of their fathers by a multitude of prayers and formalities, amidst the daily occupations of life. It allows usury, treats agricultural pursuits with contempt, and requires strict separation from the other races, and commits the government to the rabbins. The Talmud is followed by the Rabbinites, to which sect nearly all the European and American Jews belong. The sect of the Caraites rejects the Talmud and holds to the law of Moses only. It is less numerous, and its members are found chiefly in the East, or in Turkey and Eastern Russia.
The Cabala, or oral tradition, is, according to the Jews, a perpetual divine revelation, preserved among the Jewish people by secret transmission. It sometimes denotes the doctrines of the prophets, but most commonly the mystical philosophy, which was probably introduced into Palestine from Egypt and Persia. It was first committed to writing in the second century A.D. The Cabala is divided into the symbolical and the real, of which the former gives a mystical signification to letters. The latter comprehends doctrines, and is divided into the theoretical and practical. The first aims to explain the Scriptures according to the secret traditions, while the last pretends to teach the art of performing miracles by an artificial use of the divine names and sentences of the sacred Scriptures.
The Jews of the Middle Ages acquired great reputation for learning, especially in Spain, where they were allowed to study astronomy, mathematics, and medicine in the schools of the Moors. Granada and Cordova became the centres of rabbinical literature, which was also cultivated in France, Italy, Portugal, and Germany. In the sixteenth century the study of Hebrew and rabbinical literature became common among Christian scholars, and in the following centuries it became more interesting and important from the introduction of comparative philology in the department of languages. Rabbinical literature still has its students and interpreters. In Padua, Berlin, and Metz there are seminaries for the education of rabbins, which supply with able doctors the synagogues of Italy, Germany, and France. There is also a rabbinical school in Cincinnati, Ohio. The Polish rabbins and Talmudists, however, are the most celebrated.