A.T. Robertson Commentary 1 Timothy 2:5

"For there is one God, one mediator also between God and men, [himself] man, Christ Jesus," — 1 Timothy 2:5 (ASV)

One God (εις θεος). Regular Pauline argument for a universal gospel (Galatians 3:20; Romans 3:30; Ephesians 4:6).

One mediator (εις μεσιτης). Late word (Polybius, Philo) from μεσος (middle), a middle man. In N.T. only here, Galatians 3:20; Hebrews 8:6; 9:15; 12:24.

Between God and men (θεου κα ανθρωπων). Ablative case (though objective genitive may explain it) after μεσιτης (notion of separation) as in Ro 10:12; Hebrews 5:14.

Himself man (ανθρωπος). No "himself" (αυτος) in the Greek.