What Does 2 Corinthians 6:15 Mean?

And what concord hath Christ with Belial? (τίς δὲ συμφώνησις Χριστῷ πρὸς Βελίαρ; tis de symphōnēsis Christō pros Beliar?)—Symphōnēsis means harmony, agreement, or concord (root of 'symphony'). Beliar (Hebrew בְּלִיַּעַל, beliya'al, 'worthlessness' or 'wickedness') appears in the Old Testament for wicked or lawless people (Deut 13:13; Judg 19:22; 1 Sam 2:12). By New Testament times it became a name for Satan or demonic powers. Paul personifies ultimate spiritual antithesis: Christ versus Satan. The answer: zero concord, absolute incompatibility.

Or what part hath he that believeth with an infidel? (ἢ τίς μερὶς πιστῷ μετὰ ἀπίστου; ē tis meris pistō meta apistou?)—Meris means share, portion, or part—what they have in common or can share together. Pistos (believer, faithful one) versus apistos (unbeliever, unfaithful one) represents the fundamental divide of humanity: those who trust Christ and those who don't. In ultimate spiritual realities, they have no common ground, no shared inheritance, no mutual spiritual life.

Paul escalates from abstract concepts (righteousness/unrighteousness, light/darkness) to personal embodiments (Christ/Satan, believer/unbeliever). This isn't merely philosophical incompatibility but personal, relational impossibility. Attempting to unite opposites doesn't create synthesis but compromise—the holy is polluted, not the profane sanctified, when wrongly mixed.