David commits his spirit to God because he knows his times are in Gods hands already. David has lived his entire life in the sheltering hands of God. In times of deep despair and serious physical danger David has turned to God, and God has never let him down. This is as true for us as it was for him. We can escape despair by remembering Gods faithfulness and promises. Our times lie firmly in the hands of God, and we can trust that he will handle them well.