It seems that the communication of these ideas to Muhammedanism was impeded by the necessity of translating them not only into a kindred language, but into one of wholly different linguistic structure. For Muhammedanism the difficulty was lessened by the fact that it had learned Christianity in Syria and Persia through the Semitic dialect known as Aramaic, by which Greek and Persian culture had been transmitted to the Arabs before the rise of Islam. In this case, as in many others, the history of language runs on parallel lines with the history of civilisation. The necessities of increasing civilisation had introduced many Aramaic words to the Arabic vocabulary before Muhammed's day: these importations increased considerably when the Arabs entered a wider and more complex civilisation and were especially considerable where intellectual culture was concerned. Even Greek terms made their way into Arabic through Aramaic. This natural dependency of Arabic upon Aramaic, which in turn was connected with Greek as the rival Christian vernacular in these regions, is alone sufficient evidence that Christianity exerted a direct influence upon Muhammedanism. Moreover, as we have seen, the Qoran itself regarded Christians as being in possession of divine wisdom, and some reference both to Christianity and to Judaism was necessary to explain the many unintelligible passages of the Qoran. Allusions were made to texts and statements in the Thora and the Gospels, and God was represented as constantly appealing to earlier revelations of Himself. Thus it was only natural that interpreters should study these scriptures and ask counsel of their possessors. Of primary importance was the fact that both Christians and Jews, and the former in particular, accepted Muhammedanism by thousands, and formed a new intellectual class of ability infinitely superior to that of the original Muslims and able to attract the best elements of the Arab nationality to their teaching. It was as impossible for these apostate Christians to abandon their old habits of thought as it was hopeless to expect any sudden change in the economic conditions under which they lived. Christian theories of God and the world naturally assumed a Muhammedan colouring and thus the great process of accommodating Christianity to Muhammedanism was achieved. The Christian contribution to this end was made partly directly and partly by teaching, and in the intellectual as well as in the economic sphere the ultimate ideal was inevitably dictated by the superior culture of Christianity. The Muhammedans were thus obliged to accept Christian hypotheses on theological points and the fundaments of Christian and Muhammedan culture thus become identical.