The adversaries of the Lord shall be broken - Those who contend with him, מריביו meribaiu, by sinning against his laws, opposing the progress of his word, or persecuting his people.
Shall judge the ends on the earth - His empire shall be extended over all mankind by the preaching of the everlasting Gospel, for to this the afterpart of the verse seems to apply: He shall give strength unto his king, and shall exalt the horn of his Christ, or, as the Targum says, משיחיה מלכות וירבי viribbey malcuth Meshicheyh, "he shall multiply the kingdom of the Messiah." Here the horn means spiritual as well as secular dominion.
After the clause, The adversaries of the Lord shall be broken to pieces, the Septuagint add the following words: Μη καυχασθω ὁ φρονιμος εν τῃ φρονησει αυτου, κ. τ. λ. Let not the wise man glory in his wisdom and let not the rich man glory in his riches; but let him who glorieth rather glory in this, that he understandeth and knoweth the Lord; and that he executeth judgment and righteousness in the midst of the earth. This is a very long addition, and appears to be taken from Jeremiah 9:23, but on collating the two places the reader will find the words to be materially different. This clause is wanting in the Complutensian Polyglot, but it is in the edition of Aldus, in that of Cardinal Caroffa, and in the Codex Alexandrinus.
He shall give strength - This is a most remarkable passage, containing a clear and distinct prophecy of the Kingdom and glory of the Christ of God. (Compare Luke 1:69-70).