If you have not notice, the world has a different standard by-which they judge Christians. The world sees Christianity in a tainted light. They highlight the inconsistencies between the Christian faith and the believer’s practice. The world is eager to point out the inconsistencies within the church, especially when the congregants fail to keep the standards they preach.
Furthermore, the unredeemed tend to distort true biblical standards. They are inclined to lump all Christians as homophobic, narrow minded and uneducated. Some even go as far as portraying Christians as flat-earthers holding to unsupported ancient myths, straight out of primeval times.
It was no different in Peter’s day. These problems and more were part of the reason why the early believers in the 1st Century were experiencing persecution. Therefore, the Christian conduct must be honest (honorable or excellent) before the nations. So that those that slander the faith may be silenced by the believer’s godly conduct. The unredeemed may try to say evil things about Christianity, but the genuine believer’s daily works will be proving them wrong, over and over again.
Having your conversation honest among the Gentiles: that, whereas they speak against you as evildoers, they may by your good works, which they shall behold, glorify God in the day of visitation.”
– 1 Peter 2:12