What the Bible says about God's Name Profaned by Our Conduct
(From Forerunner Commentary)
Paul was speaking to those Jews who were not yet converted. At least, we hope that they were not yet converted and that they had opportunity yet to repent of those things. But this makes it very plain that God's name is hallowed—or profaned—by our conduct. The third commandment is kept—or broken—by the same. This is the commandment that tests the quality of our witness.
John W. Ritenbaugh
Holiness (Part 1)