Prayer is more effective than argument. Leave such work up to God. There are few better examples. Of course, Paul was only a worthy example insofar as he followed our supreme example, that is, Christ. Throughout the Bible, we are not only given commandments concerning how to live our lives, but also examples of saints living godly lives.
Examples are a very powerful method of instruction, giving life to the commandment.
Unfortunately, when we stumble, we can be horrid examples, turning people away from the Christian faith. Father, help us to be good examples, living a Christ-like life before those who look up to us. Also, give us discernment in who to follow as examples, as we seek to be sanctified. May this be the overriding desire of our lives. In His name we pray these things, Amen.