This title appears in the salutations of Romans, 1st and 2nd Corinthians, Galatians, Ephesians, Colossians. In Philippians, Paul and Timothy the servants of Jesus Christ. Philemon a prisoner. This formal announcement of apostleship is strange in a private letter.
By the commandment of God (κατ' ἐπιταγὴν θεοῦ)
The phrase in Rom 16:26. Κατ' ἐπιταγὴν absolutely, by commandment, 1Co 7:6, 2Co 8:8. Paul uses διὰ θελήματος θεοῦ by the will of God. See 1Co 1:1; 2Co 1:1; Eph 1:1; Col 1:1. Comp. 2Ti 1:1.
Our Savior (σωτῆρος ἡμῶν)
Comp. Luk 1:47; Jud 1:25. oP. Six times in the Pastorals. Used of both God and Christ (see Tit 1:3, Tit 1:4; Tit 2:10, Tit 2:13; Tit 3:4, Tit 3:6). The saving of men appears as God's direct will and act, 1Ti 2:4; Tit 3:5; 2Ti 1:9 as Christ's work, 1Ti 1:15, comp. 2Ti 2:10. In lxx σωτὴρ occurs twenty times, and in all but two instances, of God.
Jesus Christ which is our hope
The phrase is unique in N.T. Comp. Col 1:27, where, however, the construction is doubtful. Ἑλπὶς hope is predicated of Christ by Ignatius, Eph. xxi.; Philad. v. The salutation as a whole has no parallel in Paul.