PSALM 18
THE LORD IS MY ROCK AND MY FORTRESS
David praises God for being his protection, calling God his rock, fortress, and deliverer. David glorifies God for keeping him innocent and guiltless amid trials.
Although he had the opportunity to kill Saul on two separate occasions, David knew God would reward his faithfulness. David says that God equipped him with strength and made his way blameless. David knows that although he did the right thing, it was God’s strength that allowed him to be faithful.
The psalm wraps up with David's affirmation that God will show steadfast love to both the appointed and the descendants of David. It is indeed a profound truth, since Jesus traces His lineage back to David.
Psalm 18:30 - This God — his way is perfect; the word of the Lord proves true;he is a shield for all those who take refuge in him.