ISB ~ 1 Timothy 1 v1

Paul:The sender of the letter, traditionally identified as the great apostle to the Gentiles (2:7; Rom 11:13). As an ambassador of Christ Jesus, Paul is divinely authorized to announce the gospel to Israel and all nations (Acts 9:15). His mission stems, not from his own initiative, but from a direct command of the risen Lord (Gal 1:1, 15-16).

our Savior:Six times in the Pastoral Epistles this title is given to God the Father (2:3; 4:10; Tit 1:3; 2:10; 3:4), and four times to Jesus Christ (2 Tim 1:10; Tit 1:4; 2:13; 3:6).