1 Samuel 17:1-58. We find that the Philistines, one of the main enemies of Israel in the OT, have drawn up for battle against Israel. Saul was king of Israel, and he had his army lined up ready for battle. They stood on either side of a valley, ready to fight. Then, out from the camp of the Philistines a champion named Goliath of Gath. He was a real giant!
This was common battle strategy. You could have one person from each army fight, and the winner would win the entire other nation. If you lost, your whole country lost. That’s what your “champion” did. He went before you and for you and fought on your behalf. And the Israelites were terrified. Soon, David hears and sees Goliath himself and decides to face him. David’s confidence and courage wasn’t in himself, or armor, or even in his weapons. But only in God, and David tells Goliath, today you’re going to fall. This event didn't happen so we could face giants like problems in our life. It happened because we are the terrified Israelites and we need a champion. We need someone to go before us and fight the battle on our behalf. David is a picture of Jesus.