1. The Lord said—literally, "A saying of the Lord," (compare ), a formula, used in prophetic or other solemn or express declarations.
my Lord—That the Jews understood this term to denote the Messiah their traditions show, and Christ's mode of arguing on such an assumption () also proves.
Sit . . . at my right hand—not only a mark of honor (), but also implied participation of power (Psalms 45:9; Mark 16:19; Ephesians 1:20).
Sit—as a king (Ephesians 1:20), though the position rather than posture is intimated (compare Acts 7:55; Acts 7:56).
until I make, c.—The dominion of Christ over His enemies, as commissioned by God, and entrusted with all power (Acts 7:56) for their subjugation, will assuredly be established (Acts 7:56). This is neither His government as God, nor that which, as the incarnate Saviour, He exercises over His people, of whom He will ever be Head.
thine enemies thy footstool—an expression taken from the custom of Eastern conquerors (compare Joshua 10:24 Judges 1:7) to signify a complete subjection.

2. the rod of thy strength—the rod of correction (Isaiah 9:4; Isaiah 10:15; Jeremiah 48:12), by which Thy strength will be known. This is His Word of truth (Isaiah 2:3; Isaiah 11:4), converting some and confounding others (compare Isaiah 11:4).
out of Zion—or, the Church, in which God dwells by His Spirit, as once by a visible symbol in the tabernacle on Zion (compare Isaiah 11:4).
rule thou, c.—over enemies now conquered.
in the midst—once set upon, as by ferocious beasts (Isaiah 11:4), now humbly, though reluctantly, confessed as Lord (Philippians 2:10 Philippians 2:11).

3. Thy people . . . willing—literally, "Thy people (are) free will offerings"; for such is the proper rendering of the word "willing," which is a plural noun, and not an adjective (compare Exodus 25:2; Psalms 54:6), also a similar form (Judges 5:2-9).
in the day of thy power—Thy people freely offer themselves (Judges 5:2-7) in Thy service, enlisting under Thy banner.
in the beauties of holiness—either as in Judges 5:2-7, the loveliness of a spiritual worship, of which the temple service, in all its material splendors, was but a type; or more probably, the appearance of the worshippers, who, in this spiritual kingdom, are a nation of kings and priests (1 Peter 2:9; Revelation 1:5), attending this Priest and King, clothed in those eminent graces which the beautiful vestments of the Aaronic priests (Revelation 1:5) typified. The last very obscure clause—
from the womb . . . youth—may, according to this view, be thus explained: The word "youth" denotes a period of life distinguished for strength and activity (compare Ecclesiastes 11:9) —the "dew" is a constant emblem of whatever is refreshing and strengthening (Proverbs 19:12; Hosea 14:5). The Messiah, then, as leading His people, is represented as continually in the vigor of youth, refreshed and strengthened by the early dew of God's grace and Spirit. Thus the phrase corresponds as a member of a parallelism with "the day of thy power" in the first clause. "In the beauties of holiness" belongs to this latter clause, corresponding to "Thy people" in the first, and the colon after "morning" is omitted. Others prefer: Thy youth, or youthful vigor, or body, shall be constantly refreshed by successive accessions of people as dew from the early morning; and this accords with the New Testament idea that the Church is Christ's body (compare Micah 5:7).

4. The perpetuity of the priesthood, here asserted on God's oath, corresponds with that of the kingly office just explained.
after the order— () after the similitude of Melchisedek, is fully expounded by Paul, to denote not only perpetuity, appointment of God, and a royal priesthood, but also the absence of priestly descent and succession, and superiority to the Aaronic order.

5. at thy right hand—as , upholding and aiding, which is not inconsistent with , where the figure denotes participation of power, for here He is presented in another aspect, as a warrior going against enemies, and sustained by God.
strike through—smite or crush.
kings—not common men, but their rulers, and so all under them (Psalms 2:2; Psalms 2:10).

6. The person is again changed. The Messiah's conquests are described, though His work and God's are the same. As after a battle, whose field is strewn with corpses, the conqueror ascends the seat of empire, so shall He "judge," or "rule," among many nations, and subdue
the head—or (as used collectively for "many") "the heads," over many lands.
wound—literally, "smite," or "crush" (compare ).

7. As a conqueror, "faint, yet pursuing" [Judges 8:4], He shall be refreshed by the brook in the way, and pursue to completion His divine and glorious triumphs.