David depended so much on the presence of the Lord of Host in battle. He trusted God completely. Are you able to trust God too? No man brings pleasure to God and yet lose his battle in life. Don't depend on physical strength and weapon to win spiritual battles. Use the armour of God. All things are possible to him who believes. Don't be afraid to make mistakes while working. It is better than running from responsibility. God suspended the natural properties in iron and wood for His divine purpose.