From Psalm 56:
David was on the run, chased by Saul and by the Philistines. When David fears, he has a godly reflex response: when he fears, he trusts. When the ungodly are hateful, twisting his words, marking his steps, accusing and laying traps, they don’t do this because they just don’t know better. They do this on purpose, with evil intent. But David knew that God knew perfectly all that his enemies were doing, and all their steps and plans were known to Him. God’s omniscience was David’s comfort, and it should be ours as well. His omniscience is our comfort; it is for our good.
Courage is not the absence of fear, but doing what is right in spite of fear. “What time I am afraid, I will trust in thee” (vs. 3). Our God counts our every tear. He tells us to cast all our cares on Him because He cares for us. David responds in faith: “this I know; for God is for me” (vs. 9).
This is the reflex we should have: when we fear, we trust; when we fear, we have faith. This means that fear leads to trust which leads to praise. Christ is our promise and Christ is our grace. So we look to Him and conclude that “God is for me.” “I will not fear what man can do unto me” (vs. 11).