17 My Christian friends, I want to tell you something important. Be very careful about people who teach wrong things. They teach things that are different from God's true message that you learned. Those people cause you to quarrel with each other. They cause people to turn away from God. You must stay away from them. 18 People who are like that are not servants of our Lord Christ. Instead, they are doing the things which please themselves. They speak words that seem very nice, but they deceive people who easily accept a false message.
19 Everyone knows that you obey God well. So I am very happy because of you. But I want you to understand clearly what things are good. And I want you to stay away from the things that are bad. 20 God gives us peace in our minds. He will quickly help you to win against the power of Satan. I pray that our Lord Jesus will continue to be kind to you.