having good behavior among the nations, so in that which they speak against you as evil-doers, they may by your good works, which they see, glorify God in the day of visitation.
"Conversation" (anastrophe) refers to behavior. Our behavior is to be honest or beautiful before the unbelievers. We are as obligated to make our lives beautiful to unbelievers as we are to make them pure before God (Matthew 5:16).