What does 2 Corinthians 11:4 mean?
Paul has been defending himself against accusations that he is a false apostle driven by false motives. He now begins to properly identify his opponents in Corinth. They apparently speak more fluently and boldly than Paul. Perhaps they promise the Corinthians things from God that Paul does not.He has written boldly that he is jealous for the Corinthians on behalf of Christ (2 Corinthians 11:1–3). They belong to Christ, as a betrothed woman belongs to her promised husband. These false teachers are trying to seduce them away from true devotion to Christ. In that way, Paul's attackers are like the serpent tempting Eve to sin (Genesis 3:1–8).
Deceit is part of these false teachers, in that they also teach their warped version of Jesus, the Spirit, and the gospel. Paul makes it clear these are not true versions of any of those things. The false apostles' views of Jesus, Spirit, and gospel of the false apostles in Corinth were all different from those taught by God. They were false.
Paul is bothered that the Corinthians have accepted this false teaching easily enough. He's concerned at how they resist his true teaching. He also seems worried that they do not reject teaching about Christ that is so clearly false. They should not accept these false teachers so easily.