my buckler; or shield; who protects and defends them from their enemies, and preserves them from the fiery darts of Satan;and the horn of my salvation; who pushes, scatters, and destroys their enemies, and saves them; a metaphor taken from horned beasts; so Christ, the mighty and able Saviour, is called, Lu 1:69;[and] my high tower; such is the name of the Lord, whither the righteous run and are safe, Pr 18:10; and where they are above and out of the reach of every enemy; see Isa 33:16; in 2Sa 22:3, it is added, "and my refuge, my Saviour, thou savest me from violence".
These various epithets show the fulness of safety in Jehovah, the various ways he has to deliver his people from their enemies, and secure them from danger; and the psalmist beholding and claiming his interest in him under all these characters, rendered him exceeding lovely and delightful to him; and each of them contain a reason why he loved him, and why, in the strength of grace, he determined to love him.