What is the meaning of 2 Corinthians 6:15?

What harmony is there between Christ and Belial?

Paul’s first question insists that there is absolutely no shared ground between the Lord Jesus and the being who embodies rebellion. He frames Christ as the Light and Belial (another name for Satan) as utter darkness. The contrast is total, leaving no middle space.

• Jesus says, “I am the light of the world. Whoever follows Me will never walk in the darkness, but will have the light of life.” (John 8:12)

• Scripture explains that “The Light shines in the darkness, and the darkness has not overcome it.” (John 1:5)

• Belial’s realm is exposed by “Have no fellowship with the fruitless deeds of darkness, but rather expose them.” (Ephesians 5:11)

• Christ’s mission is explicit: “The reason the Son of God appeared was to destroy the works of the devil.” (1 John 3:8)

• God has already “rescued us from the dominion of darkness and brought us into the kingdom of His beloved Son.” (Colossians 1:13)

Because Light and darkness cannot blend, believers are commanded to guard against any partnership—doctrinal, moral, or relational—that would splice the purity of Christ with the corruption of Belial.

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Or what does a believer have in common with an unbeliever?

Paul’s second question brings the argument home to everyday relationships. Once a person is made new in Christ, the fundamental core changes. Shared hobbies or personalities may remain, but the deepest loyalties and values diverge sharply.

• Nature: “Therefore if anyone is in Christ, he is a new creation. The old has passed away. Behold, the new has come!” (2 Corinthians 5:17)

• Understanding: “The natural man does not accept the things that come from the Spirit of God… they are spiritually discerned.” (1 Corinthians 2:14)

• Identity: “But you are a chosen people, a royal priesthood, a holy nation, a people for God’s own possession.” (1 Peter 2:9)

• Affection: “Do not love the world or anything in the world.” (1 John 2:15)

• Direction: “Can two walk together without agreeing where to go?” (Amos 3:3)

• Destiny: “Our citizenship is in heaven, and we eagerly await a Savior from there.” (Philippians 3:20)

Because these foundational realities are not shared with the unbeliever, intimate bonds—especially those that shape worldview, worship, or moral choices—place the believer in a tug-of-war between incompatible masters.

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summary

Paul’s twin questions slam the door on any notion that Christ can be blended with Satan’s agenda or that a believer’s deepest life can mesh with an unbeliever’s. The passage calls every follower of Jesus to stand in the clear light of their Savior, refuse spiritual compromise, and order every relationship and partnership under the unshared lordship of Christ.