The term "The Ruler of This World" is a title used in the New Testament to refer to Satan, the adversary of God and humanity. This designation highlights Satan's temporary authority and influence over the present world system, which is characterized by sin and opposition to God's kingdom. The concept is rooted in the understanding that, although God is sovereign over all creation, Satan exercises a degree of power in the fallen world until the ultimate fulfillment of God's redemptive plan through Jesus Christ.

Biblical References:

1. John 12:31 : "Now judgment is upon this world; now the prince of this world will be cast out." In this passage, Jesus speaks of the impending judgment and the defeat of Satan through His crucifixion and resurrection. The term "prince of this world" underscores Satan's current influence but also foreshadows his ultimate expulsion and defeat.

2. John 14:30 : "I will not speak with you much longer, for the prince of this world is coming, and he has no claim on Me." Here, Jesus acknowledges the approach of His betrayal and crucifixion, yet He affirms His sinlessness and the inability of Satan to exert any rightful claim over Him.

3. John 16:11 : "and in regard to judgment, because the prince of this world has been condemned." This verse is part of Jesus' discourse on the work of the Holy Spirit, indicating that the Spirit will convict the world of judgment, as Satan, the ruler of this world, stands condemned.

Theological Implications:

The title "The Ruler of This World" reflects the biblical worldview of a cosmic struggle between good and evil, where Satan is depicted as the leader of the forces opposed to God. His rule is characterized by deception, temptation, and the propagation of sin. However, his authority is limited and ultimately subject to God's sovereign will.

Satan's Influence:

Satan's influence is evident in various aspects of the world, including moral corruption, false ideologies, and spiritual blindness. The Apostle Paul refers to him as "the god of this age" who blinds the minds of unbelievers (2 Corinthians 4:4). This influence is temporary and will be fully eradicated at the return of Christ.

Christ's Victory:

The New Testament consistently affirms that Jesus Christ has decisively defeated Satan through His death and resurrection. Colossians 2:15 states, "And having disarmed the powers and authorities, He made a public spectacle of them, triumphing over them by the cross." This victory assures believers of their ultimate deliverance from the power of Satan and the promise of eternal life in God's kingdom.

Practical Considerations for Believers:

Believers are called to live in the light of Christ's victory, resisting the devil's schemes and standing firm in their faith. Ephesians 6:11 exhorts Christians to "Put on the full armor of God, so that you can make your stand against the devil’s schemes." This spiritual armor includes truth, righteousness, the gospel of peace, faith, salvation, the Word of God, and prayer.

In summary, while Satan is referred to as "The Ruler of This World," his reign is temporary and ultimately subject to the authority of Jesus Christ, who has secured victory over sin and death. Believers are encouraged to live in the reality of this victory, anticipating the day when Christ will return to establish His eternal kingdom.