But our citizenship is in heaven, and we eagerly await a Savior from there, the Lord Jesus Christ,
But the believers' citizenship is in heaven, and from it they await a Savior, the Lord Jesus Christ.
It turns the section from warning to hope.
17Join one another in following my example, brothers, and carefully observe those who walk according to the pattern we set for you. 18For as I have often told you before, and now say again even with tears: Many live as enemies of the cross of Christ. 19Their end is destruction, their god is their belly, and their glory is in their shame. Their minds are set on earthly things. 20But our citizenship is in heaven, and we eagerly await a Savior from there, the Lord Jesus Christ, 21who, by the power that enables Him to subject all things to Himself, will transform our lowly bodies to be like His glorious body.