Fear of the Lord
God called David "a man after His own heart" because David's heart was after, or in pursuit of, God. David understood the fear of the Lord, and what it produced in a man's heart. Having "the fear of the Lord" meant David was loyal to God, seeking His opinion above all others. David said this is what made Him "clean", and God, by His words about David, demonstrated David got this right: Psalm 19: 9 The fear of the Lord is clean, enduring forever; The judgments of the Lord are true and righteous altogether. David said the fear of the Lord helped Him love God's opinions (judgments) which are completely true and righteous. What set David apart was His loyalty to God's opinions. People are tempted to "give-in" to what others think of them, even being willing to be fake before the unseen God for a moment, in an effort to not disappoint men who they can see right in front of them. Men whose opinions they fear or want to influence. David...