He begins by addressing the "heart" in the matter of modesty vs. immodesty. Second he addresses the lasting part, inner beauty. Finally, he addresses what both men and women actually wear and how it reflects the gospel to others.
He concludes by stating:
As a Christian you have the privilege and the calling to display the power and the reality of the gospel in your life. You can do that or can hinder that in the way you dress. You can dress in such a way that people see nothing of Jesus and everything of you. They might see your body and see your style, but miss Jesus altogether. Or you can dress in such a way that your clothing matches your message, that people see Christ in you.