The aim of your sermon is to encourage Christians to be on the lookout for one another. Paul wants us to think of the church as family, and to behave as family. Make it clear how the church is different from other social settings, and explain the problems that will come if we turn everything into a competition and give room for pride. Give some concrete examples of how we can help each other financially and emotionally.
26 Ne cherchons pas une vaine gloire, en nous provoquant les uns les autres, en nous portant envie les uns aux autres.