Quran, where God mentions it. He says, "O men, now is an evident proof come unto you from your Lord, and We have sent down unto you manifest light."[1] By manifest light is meant the Quran. Again He says, "O men, now is the apostle come unto you from your Lord; believe, therefore, it will be better for you,"[2] and again, "But those among them who are well-grounded in knowledge, and faithful, who believe in that which hath been sent down unto thee, and that which hath been sent down unto the prophets before thee;"[3] and again "God is the witness of the revelation which He hath sent down unto thee; He sent it down with his special knowledge; the angels are also witness thereof; but God is a sufficient witness."[4] If it be said, how can the first principle be known, that is, that there is a class of men who give the Law to teh people by divine revelation; and so also, how to know the second principle, that is, that which the