John Trapp on Psalms 21:5

Verſ. 5. His glory is great in thy ſalvation] He was at firſt ſlighted even by his own, as a petty Prince; and the Philiſtines came up to ſeek him, that they might ſuppreſs him, before he grew too ſtrong for them; in ſo much as he for fear of them went down to the Hold, 2 Sam. 5.17. but ſoon after he became formidable to them, and the reſt of the neighbour-Nations, whom he ſubdued, and reigned over. The like hereunto befell our Queen Elizabeth, who how low ſoever at firſt, became at length, as her enemies confeſſed, the moſt glorious Woman that ever ſwayed Scepter, becauſe Poſuit Deum adjutorem ſuum.

Honour and Majeſty haſt thou laid upon him] a growing weight of glory, a load of it, even before man. The Saints when they come to Heaven ſhall have an exceeding exceſſive eternal weight of glory, 2 Cor. 4.17. ſuch as if the body were not upheld by the mighty Power of God, it were impoſſible it ſhould ever bear it.