Paul. Paul's name heads all his Epistles, except Hebrews.
servant. Greek. doulos. App-190. Compare 2 Corinthians 4:5.Galatians 1:1; Galatians 1:10; Philippians 1:1; 1 Timothy 1:1; 1 Timothy 1:1.
Jesus Christ. App-98. XL
called, &c. Literally. called apostle; called at his conversion (Acts 26:17; Acts 26:18).
apostle. App-189.
separated. set apart. Greek. aphorizo. Compare Acts 13:2. Act 19:9. 2 Corinthians 6:17; Galatians 1:1; Galatians 1:15; Galatians 2:12. Note the three stages in Paul's "separation" for God's purpose: birth (Galatians 1:1; Galatians 1:15; Galatians 1:16); conversion (Acts 9:15); work (Acts 13:2).
unto. Greek. eis. App-104.
the gospel of God: i.e. the "gospel of the grace of God" (Acts 20:24. Compare Acts 15:7), not the "gospel of the kingdom". See App-140..
God. App-98.