After a brief look at the general concept of “authority,” this essay continues with an introductory discussion concerning the authority of God. It is developed in terms of (1) the declarations of Scripture; (2) the displays in God’s names, nature, and prerogatives; and (3) Satan’s denial. Then, God’s authority is discussed as it is invested in Scripture in the sense that the Bible is the voice of God and therefore speaks with His full authority. God’s authority in Scripture can thus be described as original, unalterable, exclusive, permanent, ultimate, obligatory, and consequential. Scripture is to be authoritatively preached and submissively obeyed since the Author of and the authority within will reward righteous obedience and condemn those who disregard and disobey His authority in Scripture.