The writer addressed his human king as "God" (Elohim). He did not mean that the king was God but that he stood in the place of God and represented Him. Compare Exodus 21:6; Exodus 22:8-9; and Psalm 82:1 where the biblical writers called Israel"s judges gods because they represented God. [1] This is an extravagant expression of praise for the king. God had blessed this king because he had represented the Lord faithfully by ruling as Yahweh does. God had given the king a double anointing, the writer affirmed. He had made him king, and He had blessed him with great joy as king. [source][source][source]
The writer of the Epistle to the Hebrews used these verses to point out the superiority of the Son of God to the angels ( Hebrews 1:5-7). He also used them to argue for the exaltation and righteous rule of Jesus Christ ( Hebrews 1:8-9). He viewed the anointing not so much as an event ( Matthew 3:16-17) as the permanent state of the King ( Isaiah 11:1-2). He viewed these verses as prophetic of the eternal rule of David"s greatest Son (cf. Psalm 45:6). What the writer of the psalm said of his king will happen when Jesus Christ returns to earth and sets up His kingdom that will endure forever. [source][source][source]