Definition and Scope
God's supreme authority refers to His ultimate power and sovereignty over all creation. This authority is inherent in His nature as the Creator and Sustainer of the universe. It encompasses His ability to govern, command, and execute His will without limitation or opposition. God's authority is absolute, eternal, and unchallengeable, extending over all realms—spiritual, moral, and physical.

Biblical Foundation
The Bible consistently affirms God's supreme authority. In Genesis 1:1, the foundational statement, "In the beginning God created the heavens and the earth," establishes God as the ultimate source of all that exists. His authority is further emphasized in Psalm 115:3, "Our God is in heaven; He does as He pleases," highlighting His freedom and power to act according to His will.

Divine Sovereignty
God's sovereignty is a central aspect of His supreme authority. Isaiah 46:9-10 declares, "I am God, and there is no other; I am God, and there is none like Me. I declare the end from the beginning, and ancient times from what is still to come. I say, ‘My purpose will stand, and all My good pleasure I will accomplish.’" This passage underscores God's control over history and His ability to fulfill His purposes.

Authority Over Nations and Rulers
Scripture reveals that God's authority extends over nations and their leaders. Proverbs 21:1 states, "The king’s heart is a waterway in the hand of the LORD; He directs it where He pleases." This illustrates God's power to influence and direct the decisions of earthly rulers. Daniel 2:21 further affirms, "He changes the times and seasons; He removes kings and establishes them."

Authority in Salvation
God's authority is also evident in the realm of salvation. Ephesians 1:11 speaks of believers being "predestined according to the plan of Him who works out everything by the counsel of His will." This indicates that God's authority governs the process of salvation, ensuring that His redemptive purposes are accomplished.

Christ's Authority
The New Testament reveals that Jesus Christ, as the Son of God, shares in this supreme authority. Matthew 28:18 records Jesus' declaration, "All authority in heaven and on earth has been given to Me." This authority is demonstrated through His teachings, miracles, and ultimately His victory over sin and death.

Authority Over Spiritual Realms
God's authority is not limited to the physical world but extends to spiritual realms. Colossians 1:16-17 states, "For in Him all things were created, things in heaven and on earth, visible and invisible, whether thrones or dominions or rulers or authorities. All things were created through Him and for Him. He is before all things, and in Him all things hold together." This passage affirms that all spiritual powers are subject to God's authority.

Human Response to God's Authority
The appropriate human response to God's supreme authority is one of reverence, obedience, and worship. Deuteronomy 10:12-13 exhorts, "And now, O Israel, what does the LORD your God ask of you but to fear the LORD your God by walking in all His ways, to love Him, to serve the LORD your God with all your heart and with all your soul, and to keep the commandments and statutes of the LORD that I am giving you this day for your own good?"

Conclusion
While a conclusion is not provided, the entry highlights the comprehensive nature of God's supreme authority as depicted in the Bible, emphasizing His sovereignty, control over nations, role in salvation, and the authority of Christ, as well as the expected human response to His divine rule.