1. We must first conquer our fears before we can conquer the giant. Everyone in Israel was afraid to face the giant. "When all the men of Israel saw the man, they fled from him and were greatly afraid" (17:24). David was the only one who wasn't afraid. We can't enter any battle trembling in fear, but must be totally confident of winning.
2. We must trust God to stand behind His covenant. David stood firm in God's covenant and asked, "For who is this uncircumcised Philistine, that he should taunt the armies of the living God?" (17:26). Circumcision was a sign of God's covenant. David understood the "uncircumcised" giant was no match for him because David had God's backing and Goliath wasn't under the covenant. Every child of God is under the New Covenant and we must trust the Lord to come through, even when the enemy taunts us.
3. We must remember God's faithfulness in past battles. As a shepherd, David had killed a lion and a bear that tried to attack his flock (17:34-36). These experiences were training exercises to get him ready for Goliath. David acknowledged this when he said, "He trains my hands for battle" (2 Sam. 22:35, Ps. 18:34, 144:1). He reflected on God's faithfulness, knowing that the God who gave him the skills to kill the lion and bear would also give him victory over the giant.
4. We must follow God's instructions and not man's. King Saul tried to equip David for battle by putting his bronze helmet and armor on him. David had never worn soldier's armor before and could barely walk (17:38-39). If he had tried to fight Goliath in the typical way he would have been killed! Instead, God had him use a rock and sling. We must listen carefully to the Lord about how to attack the problem, which might not be the way it has always been done.
5. We must give God the credit for giving us the victory. David didn't take credit for slaying the giant but wanted the Lord's name to be exalted, "that all the earth may know that there is a God in Israel" (17:46). And that prophecy was fulfilled. It's 3,000 years later and people all over the world know about David killing the giant through the God of Israel.
Now go kill that giant you are facing today.
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