You have given me Your shield of salvation; Your right hand upholds me, and Your gentleness exalts me.
David came to the throne through almost insurmountable trials, and foreign enemies harassed him even into old age. Rather than boast of his own victories, he exalts God as the true author of them, showing that his reign prefigures Christ's kingdom, one that will triumph over all resistance by the Father's incomprehensible power.
AI summary
Commenting on Psalm 18:1-50
Some repetitions are not vain repetitions. Second thoughts upon God's mercy should be and often are the best. Like wines on the lees our gratitude grows stronger and sweeter as we meditate upon divine goodness. The verses which we have now to consider are the ripe fruit of a thankful spirit; they are apples of gold as to matter, and they are placed in baskets...
Commenting on Psalm 18:29
"Thou hast also given me the shield of thy salvation." Above all we must take the shield of faith, for nothing else can quench Satan's fiery darts; this shield is of celestial workmanship, and is in all cases a direct gift from God himself; it is the channel, the sign, the guarantee, and the earnest of perfect salvation.