'Non christians' in the Bible

Conduct yourself with wisdom in your interactions with outsiders (non-believers), make the most of each opportunity [treating it as something precious].

and maintain good conduct among the non-Christians, so that though they now malign you as wrongdoers, they may see your good deeds and glorify God when he appears.

For the time that has passed was sufficient for you to do what the non-Christians desire. You lived then in debauchery, evil desires, drunkenness, carousing, drinking bouts, and wanton idolatries.