Two levels of citizenship are implied: they were citizens of heaven living as lights in the darkness, and without compromising their testimony, they should also be good citizens of their city. Our citizenship is in heaven, and we are an outpost of believers in a fallen world, but while we are in this world, we need to engage our communities in such a way that we make Christ appealing to the lost. Just like millions of people want to come to America, our joy, peace, and love should make others want to become followers of Christ.
