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by the Lord Jesus--by His authority and direction, not by our own. He uses the strong term, "commandments," in writing to this Church not long founded, knowing that they would take it in a right spirit, and feeling it desirable that they should understand he spake with divine authority. He seldom uses the term in writing subsequently, when his authority was established, to other churches. Co1 7:10; Co1 11:17; and Ti1 1:5 (Th1 4:18, where the subject accounts for the strong expression) are the exceptions. "The Lord" marks His paramount authority, requiring implicit obedience.

In this chapter the apostle gives earnest exhortations to abound in holiness, with a caution against uncleanness, enforced with several arguments (Th1 4:1-8). He then mentions the great duties of brotherly love, and quietness with industry in our callings (Th1 4:9-12). And concludes with comforting those who mourned for their relations and friends that died in the Lord (Th1 4:13-18).