Conduct yourselves with such honor among the Gentiles that, though they slander you as evildoers, they may see your good deeds and glorify God on the day He visits us.
KJV
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.
ASV
having your behavior seemly among the Gentiles; that, wherein they speak against you as evil-doers, they may by your good works, which they behold, glorify God in the day of visitation.