Hebrews 12:14

Try to be at peace. "You must make an effort to be at peace with the Gentiles as well as the Jews, and even with your enemies!" Try to live a holy life. "You must make a positive effort to live pure and holy, so that you will be acceptable to God!" These people were contentious, and when one sinned through weakness, they would bring anger and belligerence against him in an unholy way. In doing this they would destroy themselves as well. See what Paul says in Galatians 6:1-2.