Jesus says, “You hypocrite, first take the log out of your own eye, and then you will see clearly to take the speck out of your brother’s eye” (Matthew 7:5). You see these dynamics when David arrives at King Saul’s camp, bringing food for his older brothers. David is surprised to hear Goliath taunting the Israelites and their God. He is shocked that no one has the courage to challenge Goliath and blurts out, “Who is this uncircumcised Philistine, that he should defy the armies of the living God?” (1 Samuel 17:26). David reacts to the split between Israel’s public faith and its battlefield...