But the Spanish Jews and Spanish Arabs gained their chief distinction in philosophy. Of these are Ibn Bājjah or Avempace (d. 1138), the opponent of al-Gazāli and his mystico-sceptical method; and Abū Bakr ibn al-Tufail (1116-85), the author of a neo-platonic, pantheistic romance entitled _Risālat Haiy ibn Yakzān_, of which the main thesis is that religious and philosophic truth are but two forms of the same thing. Muhammad ibn Ahmad ibn Rushd (1126-98), best known as Averroes, taught the doctrine of the universal nature and unity of the human intellect, accounting for individual inequalities by a fantastic theory of stages of illumination. Arab though he was, Averroes was more reverenced by Jews than by men of his own race; and his permanent vogue is proved by the fact that Columbus cites him three centuries afterwards, while his teachings prevailed in the University of Padua as late as Luther's time. A more august name is that of "the Spanish Aristotle," Moses ben Maimon or Maimonides (1135-1204), the greatest of European Jews, the intellectual father, so to say, of Albertus Magnus and St. Thomas of Aquin. Born at Córdoba, Maimonides drifted to Cairo, where he became chief rabbi of the synagogue, and served as Saladin's physician, having refused a like post in the household of Richard the Lion-hearted. It is doubtful if Maimonides was a Jew at heart; it is unquestioned that at one time he conformed outwardly to Muhammadanism. A stinging epigram summarises his achievement by saying that he philosophised the Talmud and talmudised philosophy. It is, of course, absurd to suppose that his critical faculty could accept the childish legends of the _Haggadah_, wherein rabbis manifold report that the lion fears the cock's crow, that the salamander quenches fire, and other incredible puerilities. In his _Yad ha-Hazakah_ (The Strong Hand) Maimonides seeks to purge the Talmud of its _pilpulim_ or casuistic commentaries, and to make the book a sufficient guide for practical life rather than to leave it a dust-heap for intellectual scavengers. Hence he tends to a rationalistic interpretation of Scriptural records. Direct communion with the Deity, miracles, prophetic gifts, are not so much denied as explained away by means of a symbolic exegesis, infinitely subtle and imaginative. Spanish and African rabbis received the new teaching with docility, and in his own lifetime Maimonides' success was absolute. A certain section of his followers carried the cautious rationalism of the master to extremities, and thus produced the inevitable reaction of the _Kabbala_ with its apparatus of elaborate extravagances. This reaction was headed by another Spaniard, the Catalan mystic, Bonastruc de Portas or Moses ben Nahman (1195-1270); and the relation of the two leaders is exemplified by the rabbinical legend which tells that the soul of each sprang from Adam's head: Maimonides, from the left curl, which typifies severity of