The prophet is here for a sign to the people. They would not regard what he said; let it be tried whether they will regard what he does. In general, he must conduct himself so, in every thing, as became one that expected to see his country in ruins very shortly. This he foretold, but few regarded the prediction; therefore he is to show that he is himself fully satisfied in the truth of it. Others go on in their usual course, but he, in the prospect of these sad times, is forbidden and therefore forbears marriage, mourning for the dead, and mirth. Note, Those that would convince others of and affect them with the word of God must make it appear, even in the most self-denying instances, that they do believe it themselves and are affected with it. If we would rouse others out of their security, and persuade them to sit loose to the world, we must ourselves be mortified to present things and show that we expect the dissolution of them.