That the monotheistic idea, in its most vivid form, reached him in middle age by way of a vision is part of the creed of his followers; and that it derived in some way from Jews, or Persians, or Christians, as the early unbelievers declared, [1003] is probable enough. But there is evidence that among his fellow-Arabs the idea had taken some slight root before his time, even in a rationalistic form, and it is clear that there were before his day many believers, though also many unbelievers, in a future state. [1004] There is no good ground for the oft-repeated formula about the special monotheistic and other religious proclivities of "the Semite"; [1005] Semites being subject to religious influences like other peoples, in terms of culture and environment. The Moslems themselves preserved a tradition that one Zaid, who died five years before the Prophet received his first inspiration, had of his own accord renounced idolatry without becoming either Jew or Christian; but on being told by a Jew to become a Hanyf, [1006] that is to say, of the religion of Abraham, who worshipped nothing but God, he at once agreed. [1007] In the oldest extant biography of Mohammed an address of Zaid's has been preserved, of which six passages are reproduced in the Koran; [1008] and there are other proofs [1009] that the way had been partly made for Mohammedanism before Mohammed, especially at Medina, to which he withdrew (the Hej'ra) with his early followers when his fellow-tribesmen would not accept his message. He uses the term Hanyf repeatedly as standing for his own doctrine. [1010] In some of the Arab poetry of the generation before Mohammed, again, there is "a deep conviction of the unity of God, and of his elevation over all other beings," as well as a clearly developed sense of moral responsibility. [1011] The doctrine of a Supreme God was indeed general; [1012] and Mohammed's insistence on the rejection of the lesser deities or "companions of God" was but a preaching of unitarianism to half-professed monotheists who yet practised polytheism and idolatry. The Arabs at his time, in short, were on the same religious plane as the Christians, but with a good deal of unbelief; "Zendekism" or rationalistic deism (or atheism) being charged in particular on Mohammed's tribe, the Koreish; [1013] and the Prophet used traditional ideas to bring them to his unitary creed. In one case he even temporarily accepted their polytheism. [1014] The several tribes were further to some extent monolatrous, [1015] somewhat as were the Semitic tribes of Palestine; and before Mohammed's time a special worshipper of the star Sirius sought to persuade the Koreish to give up their idols and adore that star alone. Thus between their partially developed monotheism, their partial familiarity with Hanyf monotheism, and their common intercourse with the nominally monotheistic Jews and Christians, many Arabs were in a measure prepared for the Prophet's doctrine; which,