Charles H. Spurgeon on Psalms 144:1

The LORD my strength, which teacheth my hands to war. There were three qualities of a valiant soldier found in Christ, the Captain of our salvation, in his war against Satan, which his followers are bound to emulate: boldness in attack, skill in defence, steadiness in conflict, all which he teaches by his example (Mt 4:1,4,7,10-11). He was bold in attack, for he began the combat by going up into the wilderness to defy the enemy. So we, too, should be always beforehand with Satan, ought to fast, even if not tempted to gluttony, and be humble, though not assailed by pride, and so forth. He was skilful in defence, parrying every attack with Holy Writ; where we, too, in the examples of the saints, may find lessons for the combat. He was steadfast in conflict, for he persevered to the end, till the devil left him, and angels came and ministered unto him; and we, too, should not be content with repelling the first attack, but persevere in our resistance until evil thoughts are put to flight, and heavenly resolutions take their place. —Neale and Littledale.