To the end. — A beautiful connection of thought. Perfect and settled sanctification in the eyes of God is the object in view, and the means by which it is to be attained is growing and overflowing love toward mankind. (See Colossians 3:14.) St. Paul is already thinking, probably, how he shall treat the subject of chastity in the next chapter. (See Note on 1 Thessalonians 4:6.)
Before God... at the coming. — The hearts are to be unblamably holy before God — not only all through life, but also at the Judgment Day, when Jesus Christ is to judge us in the Father’s presence. Though He has “committed all judgment unto the Son” (John 5:22), yet the judgment is His own, and the Son is the agent by whom He judges, just as He is the agent by whom He creates (see Acts 17:31): therefore in that day it is in the Father’s sight rather than in the Son’s (though there can be no divergence between Them) that we are to be able to clear ourselves.
With all his saints — i.e., attended by them:-
“Thousand, thousand saints attending,
Swell the triumph of His train.”
The word might possibly be stretched to include the holy angels (Deuteronomy 33:2; Daniel 4:13, et al.); but here we may more probably suppose that St. Paul is anticipating his teaching of 1 Thessalonians 4:14, and besides, the Greek seems almost to indicate that these “saints” are to be assessors in the judgment — an honour to be given only to holy men. (Comp. Luke 22:30; John 5:28; 1 Corinthians 6:3, et al.)