II. The making of Isaiah a sign, by his unusual dress when he walked abroad. He had been a sign to his own people of the melancholy times that had come and were coming upon them, by the sackcloth which for some time he had worn, of which he had a gown made, which he girt about him. Some think he put himself into that habit of a mourner upon occasion of the captivity of the ten tribes. Others think sackcloth was what he commonly wore as a prophet, to show himself mortified to the world, and that he might learn to endure hardness; soft clothing better becomes those that attend in king's palaces (Matt. xi. 8) than those that go on God's errands. Elijah wore hair-cloth (2 Kings i. 8), and John Baptist (Matt. iii. 4) and those that pretended to be prophets supported their pretension by wearing rough garments (Zech. xiii. 4); but Isaiah has orders given him to loose his sackcloth from his loins, not to exchange it for better clothing, but for none at all—no upper garment, no mantle, cloak, or coat, but only that which was next to him, we may suppose his shirt, waistcoat, and drawers; and he must put off his shoes, and go barefoot; so that compared with the dress of others, and what he himself usually wore, he might be said to go naked. This was a great hardship upon the prophet; it was a blemish to his reputation, and would expose him to contempt and ridicule; the boys in the streets would hoot at him, and those who sought occasion against him would say, The prophet is indeed a fool, and the spiritual man is mad, Hosea ix. 7. It might likewise be a prejudice to his health; he was in danger of catching a cold, which might throw him into a fever, and cost him his life; but God bade him do it, that he might give a proof of his obedience to God in a most difficult command, and so shame the disobedience of his people to the most easy and reasonable precepts. When we are in the way of our duty we may trust God both with our credit and with our safety. The hearts of that people were strangely stupid, and would not be affected with what they only heard, but must be taught by signs, and therefore Isaiah must do this for their edification. If the dress was scandalous, yet the design was glorious, and what a prophet of the Lord needed not to be ashamed of.