13:14 Holy Ghost. This is the only one of Paul’s epistles which he closes with such a full Trinitarian benediction. Nevertheless, it fully reveals his faith in the tri-unity of the Godhead, a doctrine absolutely unique to Christianity among all the varied religions and philosophies of the world. It is also a doctrine vital to the true Christian life, for each Person is vitally involved in the creation, redemption, guidance and ultimate glorification of each believer.