David only needed 1 stone to defeat his Goliath. But he took 5. Were the extra 4 a “back-up plan” showing a lack of faith? No. David knew the Lord only needed 1; he just didn’t know which 1. So he was prepared to use any and all resources the Lord made available to him. David had a plan. But he wasn’t so presumptuous as to think that what he thought was best, was the only option God might use.