The army of Israel was terrified by a Philistine champion named Goliath, a giant of a man who challenged any Israelite to single combat. For forty days, no one dared to fight him. Then a young shepherd boy named David, visiting his brothers at the battlefront, heard the giant's taunts. Filled with faith in God, David accepted the challenge. Rejecting the king's armor, he went to face Goliath with only his shepherd's staff, a sling, and five smooth stones. David slung a stone that struck the giant in the forehead, and Goliath fell to the ground. David then took the giant's own sword and killed him, securing a great victory for Israel.
Young David defeats the giant Goliath with faith and a simple sling.

"David with the Head of Goliath"
Caravaggio
c. 1610
Oil on canvas
Galleria Borghese, Rome
Caravaggio shows the aftermath rather than the battle, focusing on David's complex emotions after his victory.
Caravaggio was known for dramatic realism and intense use of light and shadow (chiaroscuro).
Painted during Caravaggio's troubled later years, some see his own face in Goliath's head.
Practice with a "sling" using a sock and soft ball. Set up targets and see how accuracy matters more than strength.