Keep your behavior excellent among the Gentiles, so that in the thing in which they slander you as evildoers, they may on account of your good deeds, as they observe them, glorify God in the day of visitation (I Peter 2:12).
Be a fly on the wall. Sit in on religious discussions and you will come away burdened by one huge conclusion: for a large number of people who call themselves followers of Jesus, doctrine counts far more than behavior.
They didn’t get it from Jesus, I’ll tell you that. And they sure didn’t get it from Scripture.
Start at page one of the New Testament. You’re not out of the opening chapter before you see that the sexual activities of the Lord’s people is a matter of major concern. It shows up in the genealogy of Jesus, with a number of people listed having been guilty or accused of inappropriate activities of a sexual nature. Still in that chapter, Joseph hears that his beloved Mary is with child and decides to call off the engagement. It took heavenly intervention for him to change his mind.
And that’s just in the first chapter of Matthew.
Skip over to chapters 5-7, what we call “The Sermon on the Mount.” There’s doctrine there–Scripture never slights the subject–but behavior before the Gentile world by God’s people is a major consideration. Oath-taking, brotherly treatment, sexual purity, relations with one’s enemies–and we’re still in chapter 5.
Sprinkled throughout that fifth chapter of Matthew are reminders that God’s people are to live by a higher standard than the Gentiles in order to bear a faithful witness to them.