2 Corinthians 6:14

Do not try. Paul has just told them: "Open wide your hearts!" This phrase has a bad meaning in the Law (Deuteronomy 11:16). Too much tolerance would place them in a dangerous situation! Therefore he gives this warning. Paul's warning is: Do not try to work together as equals with unbelievers, for it cannot be done. The rest of this section gives examples. This verse is commonly quoted to forbid marriage with non-Christians. But it would better suit the context to understand the unbelievers to be the false teachers and their followers, and Paul's instruction to mean avoiding fellowship with them. See 1 Corinthians 5:9-13 and notes. Paul asks five questions to show how absurd it would be to form a bond with those who do not share The Faith. Right and wrong? One excludes the other! Light and darkness? Darkness is the absence of light. Paul's opponents at Corinth called themselves "servants of light," but their lives showed their darkness!