What does 2 Corinthians 10:7 mean?

Paul's legitimacy as an apostle is being challenged in the church at Corinth. This is probably coming from outsiders who are false teachers or self-titled apostles. Those opponents point to Paul's continual suffering, his weakness as a speaker when in person, and perhaps the lack of signs and wonders he performs as evidence that he is not much of a spiritual leader. Some Corinthian believers may have begun to believe these challenges, turning not just from Paul but also from Christ, whom Paul represents.

This passage urges these Christians to look at the evidence right in front of them. In other words, why is there a church in Corinth in the first place? Why do most of them even believe in Christ? They believed the gospel when Paul preached it to them. How could they believe themselves to belong to Christ and not believe that Paul also belongs to Christ?

Some translators read the Greek phrase at the beginning of this verse differently. The NIV, for instance, translates it, "You are judging by appearances," meaning that the Corinthians are sizing Paul up based on his unimpressive physical presentation instead of the spiritual reality in Christ. This translation would also make sense in the context of the letter, as does the idea that Paul is urging them to look around and see the results of his teaching with their own eyes.