1 Samuel 14:12
And the men of the garrison answered Jonathan and his armourbearer, and said, Come up to us, and we will shew you a thing. And Jonathan said unto his armourbearer, Come up after me: for the LORD hath delivered them into the hand of Israel.
The invitation to climb up was the agreed sign Jonathan had asked God for to learn whether to proceed with the attack. The Philistines' words were a taunt and a threat to punish the two Israelites for their daring in approaching the fortress. The taunt reflected their knowledge that Israel's army was weak, small in number, and hiding.
Jonathan, a man who feared the Lord, was chosen as God's instrument to deliver Israel because Saul had forfeited that honor by his presumptuous offering. Moved by a divine impulse, he sought God's counsel in earnest prayer, agreed on the token with his armor-bearer, a man of faith and prayer, and then secretly left the Israelite camp. After going down into the gorge under the shadow of the cliff, partly concealed by mounds and ridges, they were seen approaching the fortress. They then withdrew from sight and climbed by a secret, steep, rocky and difficult path to the summit of a cliff deemed inaccessible and therefore not strongly guarded, repeating as he climbed that the Lord had delivered the enemy into Israel's hand.
On receiving the challenge Jonathan took it as evidence the Lord would prosper the undertaking and declared in faith that the Lord had delivered the Philistines into the hand of Israel. His confidence was not presumption, for he did not rely on human strength, military advantage, valor, or numbers but first sought God and then advanced fearlessly in dependence on God's power to give victory despite Israel's small force. God worked through Jonathan and his armor-bearer to begin Israel's deliverance, protecting them by angels. He enabled them to penetrate the camp and slay the surprised and fearful sentinels who offered no resistance, and brought confusion and defeat on the Philistines. The victory was God's work and not a reward for Israel's righteousness, valor, or wisdom, so that God alone would be glorified.