John Gill's Bible Commentary Ver. 2. Grace be unto you, and peace , &c.] (See Gill on Romans 1:7).
Matthew Henry Commentary
Verses 1-4 - Where there is the truth of grace, there will be an increase of it. The path of the just is as the shining light, which shines more and mor unto the perfect day. And where there is the increase of grace, God must have all the glory. Where faith grows, love will abound, for fait works by love. It shows faith and patience, such as may be proposed a a pattern for others, when trials from God, and persecutions from men quicken the exercise of those graces; for the patience and faith of which the apostle gloried, bore them up, and enabled them to endure all their tribulations.
Greek Textus Receptus
χαρις 5485 N-NSF υμιν 5213 P-2DP και 2532 CONJ ειρηνη 1515 N-NSF απο 575 PREP θεου 2316 N-GSM πατρος 3962 N-GSM ημων 2257 P-1GP και 2532 CONJ κυριου 2962 N-GSM ιησου 2424 N-GSM χριστου 5547 N-GSM
Robertson's NT Word Studies
1:2 {From God the Father and the Lord Jesus Christ} (apo qeou patros kai kuriou iesou cristou). These words are not genuine in #1Th 1:1, but are here and they appear in all the other Pauline Epistles. Note absence of article both after en and apo, though both God and Lord Jesus Christ are definite. In both cases Jesus Christ is put on a par with God, though not identical. See on 1Th 1:1 for discussion of words, but note difference between en, in the sphere of, by the power of, and apo, from, as the fountain head and source of grace and peace.