I Samuel 17:31

David is at length presented to Saul for his champion (Sa1 17:31) and he bravely undertakes to fight the Philistine (Sa1 17:32): Let no man's heart fail because of him. It would have reflected too much upon the valour of his prince if he had said, Let not thy heart fail; therefore he speaks generally: Let no man's heart fail. A little shepherd, come but this morning from keeping sheep, has more courage than all the mighty men of Israel, and encourages them. Thus does God often send good words to his Israel, and do great things for them, by the weak and foolish things of the world. David only desires a commission from Saul to go and fight with the Philistine, but says nothing to him of the reward he had proposed, because that was not the thing he was ambitious of, but only the honour of serving God and his country: nor would he seem to question Saul's generosity. Two things David had to do with Saul: - I. To get clear of the objection Saul made against his undertaking. "Alas!" says Saul, "thou hast a good heart to it, but art by no means an equal match for this Philistine. To engage with him is to throw away a life which may better be reserved for more agreeable services. Thou art but a youth, rash and inconsiderate, weak and unversed in arms: he is a man that has the head and hands of a man, a man of war, trained up and inured to it from his youth (Sa1 17:33), and how canst thou expect but that he will be too hard for thee?" David, as he had answered his brother's passion with meekness, so he answered Saul's fear with faith, and gives a reason of the hope which was in him that he should conquer the Philistine, to the satisfaction of Saul. We have reason to fear that Saul had no great acquaintance with nor regard to the word of God, and therefore David, in reasoning with…