God did not want King Saul to settle for slavery to the Philistines. So he found and anointed one man - a shepherd boy with a heart true to himself. And with the gift of his Holy Spirit, God enabled David to rise to the challenge of Goliath, and gave him the victory, not by sword and spear and armour and shield, but by the unexpected path of sling and stone.
And God did not want his people to settle for slavery to sin. So he begat and anointed one man – his Son Jesus, who rose to the challenge of Satan. And God gave him the victory, not by power and wealth and fame, but by the unexpected path of sacrifice on the cross, and resurrection from the tomb.
In turn, Jesus promised to his followers the same gift of the Holy Spirit. So, as his followers, we can expect to receive courage.
If our battle with Goliath is the Lord's, we can expect victory! We can expect our battle to show that there is a God here, and that he does not save in the way people expect. ESPECIALLY if the stakes include slavery...
Gracious God, give us courage to stand firm in those battles you have anointed us to fight, so that all the world may know you, in Jesus name, amen.