So far, there was no great difference between the Sūfī and the orthodox Mohammedan zealot, except that the Sūfīs attached extraordinary importance to certain Koranic doctrines, and developed them at the expense of others which many Moslems might consider equally essential. It must also be allowed that the ascetic movement was inspired by Christian ideals, and contrasted sharply with the active and pleasure-loving spirit of Islam. In a famous sentence the Prophet denounced monkish austerities and bade his people devote themselves to the holy war against unbelievers; and he gave, as is well known, the most convincing testimony in favour of marriage. Although his condemnation of celibacy did not remain without effect, the conquest of Persia, Syria, and Egypt by his successors brought the Moslems into contact with ideas which profoundly modified their outlook on life and religion. European readers of the Koran cannot fail to be struck by its author’s vacillation and inconsistency in dealing with the greatest problems. He himself was not aware of these contradictions, nor were they a stumbling-block to his devout followers, whose simple faith accepted the Koran as the Word of God. But the rift was there, and soon produced far-reaching results. Hence arose the Murjites, who set faith above works and emphasised the divine love and goodness; the Qadarites who affirmed, and the Jabarites who denied, that men are responsible for their actions; the Muʿtazilites, who built a theology on the basis of reason, rejecting the qualities of Allah as incompatible with His unity, and predestinarianism as contrary to His justice; and finally the Ashʿarites, the scholastic theologians of Islam, who formulated the rigid metaphysical and doctrinal system that underlies the creed of orthodox Mohammedans at the present time. All these speculations, influenced as they were by Greek theology and philosophy, reacted powerfully upon Sūfism. Early in the third century of the Hegira--the ninth after Christ--we find manifest signs of the new leaven stirring within it. Not that Sūfīs ceased to mortify the flesh and take pride in their poverty, but they now began to regard asceticism as only the first stage of a long journey, the preliminary training for a larger spiritual life than the mere ascetic is able to conceive. The nature of the change may be illustrated by quoting a few sentences which have come down to us from the mystics of this period. “Love is not to be learned from men: it is one of God’s gifts and comes of His grace.” “None refrains from the lusts of this world save him in whose heart there is a light that keeps him always busied with the next world.” “When the gnostic’s spiritual eye is opened, his bodily eye is shut: he sees nothing but God.”