The aim of your sermon is to encourage Christians to be on the lookout for one another. Paul wants us to think of church as family, and to behave as family. Make it clear how church is different from other social settings and the problems that will come if we see things as a competition and give room for pride. Give some concrete examples of how we can help each other financially and emotionally.
26 Let us not become conceited, provoking one another, envying one another.