The Book which is revealed on behalf of God contains many details, but its purpose is but one and that is that man should firmly believe that he has to face God. In other words, he should spend life in the world in such a way that he should always treat himself as being answerable to God for his each and every action. His life should be a responsible life and not a free and unrestricted life. This was the purpose of previous Books and this is likewise the aim of the Quran. God has given full freedom to human beings, while keeping the rest of the world under His direct orders and subject to His regulation. The method devised by Him for human guidance is to make people aware of Truth and falsehood through the Prophets as well as His Books which are couched in the language of reason.In the world, God’s will appears before the people in the shape of reasoning. Here, acceptance of this reasoning means acceptance of God and rejection of this reasoning amounts to rejection of God.