V.1-3 Paul loved and longed for the blessing of the Corinthians! He wanted these believers to be true and faithful to their Lord. But he knew that as Satan had deceived Eve, so Satan would try to deceive them.
V.4 False teachers had already come in, and Paul warns against them.
V.13-15 Warnings about these teachers, and the enemy whom they represent. “The ministers of Satan.” That is strong language but it is needed. There are many today who come to our houses with bad doctrines. They act like “angels of light” and carry a Bible with them, and speak much of God, but they deny the divinity of the Lord Jesus; that He is God the Son.
V.21-29 This account makes us ashamed, for we feel that we have suffered little, if any, for the Lord. If we stand for the truth of God’s Word, we shall be criticized, even sometimes by other believers.
V.30 And now we see that he does not glory in what he has suffered, but rather in his infirmities (weaknesses): this magnified the power and grace of God.