What does Psalms Chapter 21 say, and which statements belong to its speaker?

The Latin incipit is Deus Deus meus. The separate heading describes Christ's passion and Gentile conversion. The inscription is unto the end, for the morning protection, for David. The speaker asks God to look upon him and why He forsook him, saying the words of his sins are far from salvation. The separate note interprets those words as the world's sins taken on himself, crying against him as the cause of sufferings. He shall cry by day without hearing and by night without its being reputed folly. God dwells in the holy place as Israel's praise. Fathers hoped, were delivered and cried without being confounded.

The speaker calls himself a worm and no man, reproach and outcast. Onlookers laugh, wag heads and taunt that the Lord should deliver the one hoping in Him. God drew him from the womb and was his God and hope from his mother's breasts. He asks Him not to depart because trouble is near with no helper. Calves surround and fat bulls besiege, with mouths opening like a ravening lion. He is poured out like water, bones scattered, heart melting like wax, strength dry like a potsherd and tongue cleaving to jaws in death's dust. Dogs and a malignant council besiege him; they have dug hands and feet, numbered bones and stared, parted garments and cast lots on his vesture. These images do not establish a clinical diagnosis or a separately recorded execution scene.

He asks God's help and defense, soul's delivery from sword, his only one from the dog and his lowness from lion and unicorn horns. He will declare God's name to brethren and praise in church, calling Jacob and Israel to praise and fear because God neither despised the poor man's supplication nor turned away His face and heard his cry. He will pay vows before those fearing God. The poor shall eat, be filled and praise, with hearts living forever; earth's ends shall remember and turn to God and Gentile kindreds adore. The kingdom is the Lord's and He shall rule nations. The fat ones have eaten and adored; those going down to earth shall fall before Him. His soul shall live and seed serve, with a coming generation declared to the Lord and heavens showing justice to a people yet to be born. The text changes from supplication to witness and future promises without narrating the timing of rescue or the completion of universal conversion.