The New Testament quotes this psalm more than any other, and proves it to speak of Christ and none other. Such prophetic certainty and fulfilment is the glory of Scripture’s veracity. Augustine writes of this psalm as brief in words, but great in weight. It is the counterpart to Psalm 2.
Christ’s kingship is spoken of, and the perpetuity of His reign and kingdom. Also, the subjection and willingness of His subjects are described. There is the description of Christ as the Great High Priest, of whom Melchizedek was a type and shadow by his life. Victory over the heathen is assured, which either speaks of the Gentile conversion, or the judgments wrought upon wicked nations.
But this victory would not be accomplished without Christ suffering. He must drink of the brook, as figured when He crossed Cedron (the black water), to go to Calvary (John 18:1).