2 Corinthians 10:7 Do ye look on things after the outward appearance? If any man trust to himself that he is Christ’s, let him of himself think this again, that, as he is Christ’s, even so are we Christ’s.

The Apostle Paul has to explain that no one has an exclusive claim on Christ. [MacDonald] He belongs to the Lord Jesus as truly as the others whom he was referring. Although his outward demeanour may appear weak and his speech far from eloquent, he too belongs to Christ and does the work of Christ. As such, he bade the Corinthian church to look at the facts, the fruit of the work that has begun in Corinth. His apostleship was from Christ. It was the Lord who called him to service. Even so, the team that was with him in the work.

He was engaging the church in Corinth to look at the fruit of his ministry before he and his team would be dismissed as less than authentic servants of God.