Thou hast loved righteousness - Thou hast been obedient to the Law of God, or holy and upright. Nothing can be more truly adapted to express the character of anyone than this is to describe the Lord Jesus, who was "holy, harmless, undefiled," who "did no sin, and in whose mouth no guile was found;" but it is with difficulty that this can be applied to Solomon. Assuredly, for a considerable part of his life, this declaration could not well be appropriate to him; and it seems to me that it is not to be regarded as descriptive of him at all. It is language prompted by the warm and pious imagination of the Psalmist describing the future Messiah - and, as applied to him, is true to the letter. "Therefore God, even thy God." The word "even" inserted here by the translators, weakens the force of the expression. This might be translated, "O God, thy God hath anointed thee." So it is rendered by Doddridge, Clarke, Stuart, and others.

The Greek will bear this construction, as well the Hebrew in Psalm 45:7. In the margin in the Psalm it is rendered "O God." This is the most natural construction, as it accords with what is just said before. "Thy throne, O God, is forever. Thou art just and holy, therefore, O God, thy God hath anointed thee," etc. It is not material, however, which construction is adopted. "Hath anointed thee." Anciently kings and priests were consecrated to their office by pouring oil on their heads; see Leviticus 8:12; Numbers 3:3; 1 Samuel 10:1; 2 Samuel 2:7; Psalm 2:2; Isaiah 61:1; Acts 4:27; Acts 10:38; Note, Matthew 1:1. The expression "to anoint," therefore, comes to mean to consecrate to office, or to set apart to some public work. This is evidently the meaning in the Psalm, where the whole language refers to the appointment of the personage there referred to to the kingly office. "The oil of gladness." This probably means the perfumed oil that was poured on the head, attended with many expressions of joy and rejoicing. The inauguration of the Messiah as king would be an occasion of rejoicing and triumph. Thousands would exult at it as in the coronation of a king; and thousands would be made glad by such a consecration to the office of Messiah. "Above thy fellows." Above thine associates; that is, above all who sustain the kingly office. He would be more exalted than all other kings. Doddridge supposes that it refers to angels, who might have been associated with the Messiah in the government of the world. But the more natural construction is to suppose that it refers to kings, and to mean that he was the most exalted of all.

Hebrews 1:9 Parallel Commentaries

Mason -- Messiah's Throne
John Mitchell Mason, the eminent divine of the Reformed Presbyterian Church, was born in New York City in 1770. He completed his studies and took his degree at Columbia College and thence proceeded to take a theological course at Edinburgh. Ordained in 1793, he took charge of the Cedar Street Church, New York City, of which his father had been pastor. In 1807 he became editor of the Christian Herald, and in 1821 was made president of Dickinson College, Carlisle, Pennsylvania. He died in 1829. MASON …
Grenville Kleiser—The world's great sermons, Volume 3

The Winsome Jesus.
The Face of Jesus: Jesus drew crowds, men, women, children, bad people, enemies--His personality--face--impress of experiences--the glory of God in that face, 2 Corinthians 4:6. Hebrews 1:3. The Music of God in the Voice of Jesus: the eye--Jesus' eyes, Luke 4:16-30. John 8:59. 10:31. 7:32, 45, 46. 18:6. Mark 10:32. 9:36. 10:13-16. Luke 19:48.--His voice, Matthew 26:30. personal touch, Matthew 8:3, 15. 9:29. 17:7. 20:34. Mark 1:41. 7:33. Luke 5:13. 22:51. (John 14:16-20). His presence irresistible. …
S. D. Gordon—Quiet Talks about Jesus

Meditations of the Blessed State of the Regenerate Man after Death.
This estate has three degrees:--1st, From the day of death to the resurrection; 2d, From the resurrection to the pronouncing of the sentence; 3d, After the sentence, which lasts eternally. As soon as ever the regenerate man hath yielded up his soul to Christ, the holy angels take her into their custody, and immediately carry her into heaven (Luke xvi. 22), and there present her before Christ, where she is crowned with a crown of righteousness and glory; not which she hath deserved by her good works, …
Lewis Bayly—The Practice of Piety