The Karaites had composed numerous expositions of the Bible, the Rabbanites but few. Saadiah, who felt this want, undertook to translate the Bible into Arabic, the language understood, at this time, from the extreme West to India. To this translation he added notes, for three reasons. He wished to make the Bible accessible to the people. He thought that thereby the influence of Karaism, which sought to refute Talmudic Judaism through its exegesis, would be counteracted. Finally, he wished to remove the misconceptions of the people, and conquer the perversity of the mystics, who rendered the words of the Bible literally, and thus gave an unworthy description of the Godhead. He favored the philosophical idea which conceives God in His exaltedness and holiness to be a spirit. His translation was to satisfy both reason and Talmudical tradition. This was the basis of his view of Judaism. Teachings of the Talmud are as divine as those of the Bible, and neither the Bible nor tradition may be contrary to reason. According to Saadiah, the contradictions are only on the surface, and he sought by his translation and exposition to remove this illusion. To carry out this aim, he adopted interpretations of the text which are arbitrary and forced. Out of deference to his Mahometan readers, Saadiah made use of Arabic characters, which were seldom employed by the Jews who wrote Arabic. Although Saadiah shows great mental power and independence in his translation, his renderings cannot be highly praised. The very fact that he does not allow the text to speak its own language, and that he wished to find at one time the Talmudical tradition, at another a philosophical meaning in the words and the context, necessarily prevented him from giving a true exposition. He impressed the exegesis of Scripture into the service of tradition and of the philosophy of the time, and made the text imply more than the meaning of the words allowed. At the same time that he wrote his translation, Saadiah composed a kind of Hebrew grammar in the Arabic language. He also composed a Hebrew lexicon (in Hebrew, Iggaron). Even here he often missed the truth as to the grammar and etymology of the words. His exegetical and grammatical works are of importance in so far as they broke fresh ground in Rabbanite studies, and introduced exegesis and philology as new departments. Even his mistakes proved instructive in later times.