Psalms 21:1 - Matthew Poole's English Annotations on the Holy Bible

PSALM 21 The subject of this Psalm is the same with the former, both being made for the people's use, concerning the king; only the prayers there used are here turned into praises for the blessings received in answer to their prayers. And as David was an illustrious type of Christ, so in many of these expressions he may seem to look beyond himself unto Christ, in whom they are more properly and fully accomplished, and of whom divers of the ancient Hebrew doctors understand it. David, out of a sense of God's answering his prayers for all he asked, professeth his joy and gladness in him, Psalms 21:1-6. His confidence for further success, Psalms 21:7; that God will find out and consume his enemies, Psalms 21:8-12. He prayeth that God would exalt his strength, that he might praise his power, Psalms 21:13. In thy strength conferred upon him, and put forth by thee on his behalf against his enemies.