While the study of the old Talmudic lore was maintained, the greatest teachers developed tradition afresh by a philosophical restatement designed to make it appeal to the mental attitude of the enlightened. The sermon flourished again, collections of Haggadah (Yalkut) were made as storehouses of homilies, and metaphysical treatises modelled upon the works of the schoolmen set forth a philosophical Judaism for the learned world. It is notable also that these last were not written in Hebrew or in the Talmudic dialect, but in Arabic, the language of their cultured environment; for though the missionary spirit was dead, the controversial activity of the period impelled the Jewish philosophers to present their ideas in the form used by the philosophers of the general community. It is not only the general conditions of the Arab-Jewish period, but also the special development of Jewish ideas, which recalls the work of the Alexandrian school. This was, indeed, to be expected, seeing that in both cases there was a mingling of Hebraism and Hellenism. In Spain, however, the Jews acquired Hellenism at second hand, and through the somewhat distorted medium of Arabic translations or scholastic misunderstanding, and hence the harmony is neither complete nor pure. They endeavored to show that the teachings of Aristotle are implicit in the written and the oral law, but the interpretation is hardly convincing even in "The Guide of the Perplexed," of Maimonides, the monumental work which marks the culmination of mediæval Jewish philosophy.