There were some “enemies of the cross of Christ,” in Philippians 3:19, “who set their mind on earthly things” (3:20). There are things that are “upon the earth” for which some seek, but notice the sharp contrast that is drawn with those of another group. Paul says that the “citizenship” of faithful 
Christians “is in heaven.” God uses plain language to distinguish between earth and heaven, and He will not permit the two places to be equated in any way (cf. Matt. 6:19-20). In fact, He tells us that heaven is the place “from which we also eagerly wait for the Savior” (3:20). The Bible calls “heaven” the place “from which” Jesus will come, and the place that is “reserved” (1 Pet. 1:4) for us and to which Jesus will “receive” us to Himself when He returns (John 14:3).
Thank God for the glorious promise of an “eternal” home not on this earth but “eternal in the heavens” (2 Cor. 5:1), “to be present with the Lord” (5:8)! What a thought!