2. By way of admonition concerning their danger. Because they would not be ruled by fair reasoning, God takes another method with them; by less judgments he threatens greater, and sends his prophets to give them this explication of them, and to frighten them with an apprehension of the danger they were in (v. 17); Also I set watchmen over you. God's ministers are watchmen, and it is a great mercy to have them set over us in the Lord. Now observe here, (1.) The fair warning given by these watchmen. This was the burden of their song; they cried again and again, Hearken to the sound of the trumpet. God, in his providence, sounds the trumpet (Zech. ix. 14); the watchmen hear it themselves and are affected with it (Jer. iv. 19), and they are to call upon others to hearken to it too, to hear the Lord's controversy, to observe the voice of Providence, to improve it, and answer the intentions of it. (2.) This fair warning slighted: "But they said, We will not hearken; we will not hear, we will not heed, we will not believe; the prophets may as well save themselves and us the trouble." The reason why sinners perish is because they do not hearken to the sound of the trumpet; and the reason why they do not is because they will not; and they have no reason to give why they will not but because they will not, that is, they are herein most unreasonable. One may more easily deal with ten men's reasons than one man's will.