John Gill Bible Commentary

But my horn shall thou exalt like the horn of an unicorn,.... Which is said to be very high and strong, see Deu 33:17 this may be understood of the establishment of David's kingdom, of his royal authority, power, and the glory of it, signified by his horn; which was fulfilled when he had subdued the neighbouring nations, and the kings of them, and was exalted above them, and had rest from all his enemies: and may be applied unto the Messiah, the horn of David, the horn of salvation raised up in his house, Psa 132:17 and so may refer to exaltation at the right hand of God, and the strength and glory of his kingdom; see Sa1 2:10, and also may be interpreted of every good man, in opposition to the wicked; who, though low and abased, God will exalt and set them among princes, and cause them to inherit the throne of glory, and even to sit down on the same throne with Christ; see Sa1 2:8. I shall be anointed with fresh oil; oil of olive, as the Targum; oil of myrrh, as Aben Ezra; it may respect David's unction to office, as king of Israel; for not only after he had been anointed by Samuel, but even after he was anointed by the men of Judah as king over them, he was afresh anointed by all the tribes of Israel as their king, Sa2 2:4, "oil" often signifies the Spirit of God, his gifts and graces; and "fresh" oil may intend new supplies of his grace out of the fulness of it, which is in Christ; and also the renewed joys and comforts of the Holy Spirit, who is the oil of gladness Christ was anointed with above his fellows, and is given to his people in measure.