The Bible presents Satan as a created spiritual being who is an adversary to God and His people, yet he remains entirely under the sovereign control of the Lord. While he is allowed to tempt and afflict, his power is limited by God's providence, and his ultimate defeat is guaranteed in the triumph of Jesus Christ.
Scripture reveals that Satan is not a co-equal opposite to God, but a created being subject to the Lord's absolute authority. In the book of Job, we see Satan appearing before Jehovah, unable to act against Job without explicit permission. Even when permitted to afflict, his power is strictly bounded, illustrating that he is never independent of the Creator’s providence. As the 1689 LBCF Ch.26 §3 warns, there are entities and assemblies that have so degenerated as to become 'synagogues of Satan,' yet we take comfort that Christ reigns over all. We must remember that while the enemy prowls, he is a 'leashed' adversary whose movements are orchestrated to serve God's greater purposes, which are always for the good of His people.
While Satan acts as the tempter and accuser, his ultimate end is fixed. Revelation 20 recounts his final judgment, where he is cast into the lake of fire, never to deceive the nations again. This reality grounds our hope in the gospel: although we are far more sinful and prone to temptation than we dare believe, we are more accepted and secure in Christ than we ever dared hope. Because Christ has conquered the grave and secured our redemption, the devil has no final claim upon the believer. Our victory is not found in our own strength against the powers of darkness, but in the finished work of the One who has already disarmed the enemy.