A Christian's Citizenship is Heaven
Let me be your example here, my brothers: let my example be the standard by which you can tell who are the genuine Christians among those about you. For there are many, of whom I have told you before and tell you again now, even with tears, that they are the enemies of the cross of Christ. These men are heading for utter destruction—their god is their own appetite, their pride is in what they should be ashamed of, and this world is the limit of their horizon.
But we are citizens of Heaven; our outlook goes beyond this world to the hopeful expectation of the saviour who will come from Heaven, the Lord Jesus Christ. He will re-make these wretched bodies of ours to resemble his own glorious body, by that power of his which makes him the master of everything that is.
[For our citizenship is in heaven, from which we also eagerly wait for the Savior, the Lord Jesus Christ, who will transform our lowly body that it may be conformed to His glorious body, according to the working by which He is able even to subdue all things to Himself. - NJKV]