As to those who have debarred themselves from the Revelation of God, they have indeed failed to understand the significance of a single letter of the Qur'án, nor have they obtained the slightest notion of the Faith of Islám, otherwise they would not have turned away from God, Who hath brought them into being, Who hath nurtured them, hath caused them to die and hath proffered life unto them, by clinging to parts of their religion, thinking that they are doing righteous work for the sake of God.