Although someone has confused you, I am sure that you will not accept his false teaching, and that God will punish him.

Galatians 5:7-12

7 You were progressing well spiritually [MET]. You should not have let someone influence you so that now you are not believing the true message about Christ [RHQ]! 8 God, the one who chose you, is not the one who is persuading you to think like this! 9 Remember that this false doctrine that someone is teaching you will affect all of you, just like [MET] a little yeast causes all of the dough to swell up. 10 Nevertheless, because of my relationship with the Lord, I am certain that you will think only as I do about forcing people to obey rules and rituals. Furthermore, God will punish anyone who is confusing you by teaching this false message, even if he is an important person. 11 But, my fellow believers, although someone claims that I am proclaiming that men must be circumcised, I certainly am not still proclaiming that. Remember that the Jews are still ◄persecuting me/causing me to suffer►. If I were still proclaiming that men must be circumcised in order for God to accept them, ◄the Jews would not be persecuting me./why would the Jews be persecuting me?► [RHQ] They would [RHQ] not be persecuting me/causing me to suffer because then the Jews would no longer be offended. They ◄are offended/do not want to accept what I teach► because I proclaim that Christ, the Messiah, died on the cross [MTY]. 12 I would even wish that those who are disturbing you by insisting that men be circumcised would also emasculate [EUP] themselves, with the result that they would be expelled from your congregations!