David says, "I want to fight Goliath," and Saul tries to give him his armor, because Saul is thinking, "Oh, when you say 'fight Goliath,' you mean 'fight him in hand-to-hand combat,' infantry on infantry."
David le dice "Quiero luchar contra Goliat", y Saúl intenta darle su armadura porque piensa "Oh, cuando dices 'luchar contra Goliat', quieres decir 'luchar en un combate cuerpo a cuerpo', infantería contra infantería".