the physicist or of the metaphysician. And so it is not strange to find that all Muslim thinkers have been tinged with mysticism to a greater or less degree, though they may not all have embraced formal Sufiism and accepted its vocabulary and system. This is true of al-Farabi, who was avowedly a Sufi; true also of Ibn Sina, who, though nominally an Aristotelian, was essentially a neo-Platonist, and admitted the possibility of intercourse with superior beings and with the Active Intellect, of miracles and revelations; true even of Ibn Rushd, who does not venture to deny the immediate knowledge of the Sufi saints, but only argues that experience of it is not sufficiently general to be made a basis for theological science.

In ethics, as we have already seen, the position of al-Ghazzali is a simple one. All our laws and theories upon the subject, the analysis of the qualities of the mind, good and bad, the tracing of hidden defects to their causes—all these things we owe to the saints of God to whom God Himself has revealed them. Of these there have been many at all times and in all countries, and without them and their labors and the light which God has vouchsafed to them, we could never know ourselves. Here, as everywhere, comes out al-Ghazzali's fundamental position that the ultimate source of all knowledge is revelation from God. It may be major revelation, through accredited prophets who come forward as teachers, divinely sent and supported by miracles and by the evident truth of their message appealing to the human heart, or it may be minor revelation—subsidiary and explanatory

—through the vast body of saints of different grades, to whom God has granted immediate knowledge of Himself. Where the saints leave off, the prophets begin; and, apart from such teaching, man, even in physical science, would be groping in the dark.

This position becomes still more prominent in his philosophical system. His agnostic attitude toward the results of pure thought has been already sketched. It is essentially the same as that taken up by Mansell in his Bampton lectures on "The Limits of Religious Thought." Mansell, a pupil and continuator of Hamilton, developed and emphasized Hamilton's doctrine of the relativity of knowledge, and applied it to theology, maintaining that we cannot know or think of the absolute and infinite, but only of the relative and finite. Hence, he went on to argue, we can have no positive knowledge of the attributes of God. This, though disguised by the methods and language of scholastic philosophy, is al-Ghazzali's attitude in the Tahafut. Mansell's opponents said that he was like a man sitting on the branch of a tree and sawing off his seat. Al-Ghazzali, for the support of his seat, went back to revelation, either major, in the books sent down to the prophets, or minor, in the personal revelations of God's saints. Further, it was not only in the Muslim schools that this attitude toward philosophy prevailed. Yehuda Halevi (d. A.D. 1145; al-Ghazzali, d. 1111) also maintains in his Kusari the insufficiency of philosophy in the highest questions of life, and bases religious truth on the incontrovertible historical facts of revelation. And Maimonides