Jesus informs us clearly our duties when others are doing wrong.
If they don’t listen to us, we should inform others, so the person informed has many points of input for their problem. If the person still does wrong, it is their fault and no fault is held on us for ignoring the issue.
We are reminded we will get our rewards in eternal life based on our actions and words in this life.
Praying together is the most powerful tool we have to change the world and lives of others.