2Thessalonians 1:1-2 Paul, and Silvanus, and Timotheus, unto the church [congregations] of the Thessalonians in God our Father and the Lord Jesus Christ: Grace unto you, and peace, from God our Father and the Lord Jesus Christ.
‘Paul’ – In all his epistles except 1 Thessalonians and 2 Thessalonians, Philippians and Philemon, Paul calls himself an apostle. It may be that he was held in such affection by these congregations that he did not need to assert his apostolic authority.
‘Silvanus’ – The same as Silas, Paul’s companion on his second missionary journey. He took part in the founding of the Macedonian congregations (Acts 15:40-18:18).
‘Timotheus’ – was called Timothy (2Cor. 1:1; 1Tim. 1:2, 18; 6:20; 2Tim. 1:2; Phm. 1; Heb. 13:23). Converted by Paul on his first trip (Acts 14:6-7 with 1Tim. 1:2). Part Jew and Greek, uncircumcised, but a true Christian (Acts 16:1-3). A miracle worker like Paul (1Cor. 16:10). Paul’s companion from here on (Acts 16:1-3; 17:14-15; 18:5; 19:22; 20:4; Rom. 16:21; 1Cor. 4:17; Php. 2:19). It is believed by some that he was Paul’s scribe in writing Hebrews and Galatians.
‘Unto the church of the Thessalonians in God our Father and the Lord Jesus Christ.’ This and the second epistle are the only ones so addressed. Compare this with the other salutations in other epistles.
‘In God our Father and the Lord Jesus Christ.’ One in unity (John 10:30; 17:11, 21-23), not one in person or individuality (Dan. 7:9-14; 1Jn. 5:7; Acts 7:55; Rom. 8:34; 1Cor. 8:6; 11:3; Eph. 1:20-23; 4:1-6; 1Tim. 2:5; Heb. 1:3; 8:1; 12:2; 1Pet. 3:22; Rev. 5:1-7).
‘God our Father and the Lord Jesus Christ.’ Twice here it is made clear that the Father and the Lord Jesus Christ are two separate and distinct persons. Believers are in both and the salutation is from both through Paul.