1. How careful they were to improve all advantages that might contribute to their safety. When Sennacherib had made himself master of all the defenced cities of Judah, and Jerusalem was left as a cottage in a vineyard, they thought it was time to look about them. A council was immediately called, a council of war; and it was resolved to stand upon their defence, and not tamely to surrender. Pursuant to this resolve, they took all the prudent measures they could for their own security. We tempt God if, in times of danger, we do not the best we can for ourselves. (1.) They inspected the magazines and stores, to see if they were well stocked with arms and ammunition: They looked to the armour of the house of the forest, which Solomon built in Jerusalem for an armoury (1 Kings x. 17), and thence they delivered out what they had occasion for. It is the wisdom of princes, in time of peace, to provide for war, that they may not have arms to seek when they should use them, and perhaps upon a sudden emergency. (2.) They viewed the fortifications, the breaches of the city of David; they walked round the walls, and observed where they had gone to decay for want of seasonable repairs, or were broken by some former attempts made upon them. These breaches were many; the more shame for the house of David that they suffered the city of David to lie neglected. They had probably often seen those breaches; but now they saw them to consider what course to take about them. This good we should get by public distresses, we should be awakened by them to repair our breaches, and amend what is amiss. (3.) They made sure of water for the city, and did what they could to deprive the besiegers of it: You gathered together the water of the lower pool, of which there was probably no great store, and of which therefore they were the more concerned to be good husbands. See what a mercy it is that, as nothing is more necessary to the support of human life than water, so nothing is more cheap and common; but it is bad indeed when that, as here, is a scarce commodity. (4.) They numbered the houses of Jerusalem, that every house might send in its quota of men for the public service, or contribute in money to it, which they raised by a poll, so much a head or so much a house. (5.) Because private property ought to give way to the public safety, those houses that stood in their way, when the wall was to be fortified, were broken down, which, in such a case of necessity, is no more an injury to the owner than blowing up houses in case of fire. (6.) They made a ditch between the outer and inner wall, for the greater security of the city; and they contrived to draw the water of the old pool to it, that they might have plenty of water themselves and might deprive the besiegers of it; for it seems that was the project, lest the Assyrian army should come and find much water (2 Chron. xxxii. 4) and so should be the better able to prolong the siege. If it be lawful to destroy the forage of a country, much more to divert the streams of its waters, for the straitening and starving of an enemy.