Why did king david kill giant Goliath?

Answer 1

It's worth noting that David wasn't king when he killed Goliath. This is detailed in full in 1 Samuel chapter 17, but basically, the Israelites were constantly at war with the Philistines, and at one point, they camped their armies across from each other. The 9-foot champion of the Philistines was Goliath, and he challenged Israel to send out one man to fight him. All of the soldiers were too cowardly to accept this challenge. David was still living at home in Bethlehem at the time, but his three oldest brothers were fighting in the war. So David was sent back and forth between tending to the flocks of sheep at home and going to Saul's army. One day while he was bringing his brothers supplies from home, he arrived as Goliath was shouting his daily challenge that no one had yet accepted. He was outraged that none of the soldiers would fight Goliath, so he volunteered. And the rest, as they say, is history. He went out with five smooth stones and a sling because he was not comfortable in Saul's armor.