the knowledge of the existence of God, and calling them to the confession of His belief. It is quite evident from many verses of the Divine Book, that in it the people have been called to verify the existence of the Creator by arguments of reason which are mentioned in it. For instance, there are the following verses of the Quran, " O men of Mecca, serve your Lord who has created you and those before you,"[1] and " Is there any doubt concerning God, the Creator of heaven and earth?"[2] and other verses on the subject found therein. It is not fit for a man to say, that if these arguments had been necessary for believing in God—that is, had his faith been not completed without understanding them—the Prophet would not have invited anybody to Islam without presenting to him all these arguments, for the Arabs already knew the existence of the Creator, so that God has said, "If thou asketh them who has
