(2) Go and loose the sackcloth from off thy loins.--Against these schemes Isaiah was prompted to prophesy in act as well as words. Month by month, for three whole years, he was seen in the streets of Jerusalem as one who was already as a prisoner of war, ready to be led into an ignominious exile. The "sackcloth" was the "rough garment" which, like Elijah (2Kings 1:8) and John the Baptist, the prophets habitually wore (Zechariah 13:4), and the "nakedness" was confined to the laying aside this outer robe, and appearing in the short tunic worn near the body (1Samuel 19:24; 2Samuel 6:14-20; John 21:7). Like instances of prophetic symbolism are the horns of Zedekiah in 1Kings 22:11, the yokes worn by Jeremiah (Jeremiah 27:2), Ezekiel's lying on his side (Ezekiel 4:4), and the girdle with which Agabus bound himself (Acts 21:11).

Verse 2. - Loose the sackcloth from off thy loins. Dr. Kay supposes that Isaiah was wearing sackcloth exceptionally, as during a time of mourning. But it is more probable that the Hebrew sak represents the haircloth ("rough garment," Zechariah 13:4), which, as ascetics, the Hebrew prophets wore habitually (2 Kings 1:8; Matthew 3:4). Walking naked. Probably not actually "naked," for captives were not stripped bare by the Assyrians, but with nothing on besides his short tunic, as the male captives are commonly represented in the Assyrian sculptures.

20:1-6 The invasion and conquest of Egypt and Ethiopia. - Isaiah was a sign to the people by his unusual dress, when he walked abroad. He commonly wore sackcloth as a prophet, to show himself mortified to the world. He was to loose this from his loins; to wear no upper garments, and to go barefooted. This sign was to signify, that the Egyptians and Ethiopians should be led away captives by the king of Assyria, thus stripped. The world will often deem believers foolish, when singular in obedience to God. But the Lord will support his servants under the most trying effects of their obedience; and what they are called upon to suffer for his sake, commonly is light, compared with what numbers groan under from year to year from sin. Those who make any creature their expectation and glory, and so put it in the place of God, will, sooner or later, be ashamed of it. But disappointment in creature-confidences, instead of driving us to despair, should drive us to God, and our expectation shall not be in vain. The same lesson is in force now; and where shall we look for aid in the hour of necessity, but to the Lord our Righteousness, throne of grace, and serving with each other in the same business of religion, should end all disputes, and unite the hearts of believers to each other in holy love.At the same time spake the Lord by Isaiah the son of Amoz,.... Or, "by the hand of Isaiah", by his means; and it was to him likewise, as the following words show; and so the Septuagint version renders it; he spoke by him, by the sign he used, according to his order, and he spoke to him to use the sign:

saying; so the Arabic version, "with him"; and with these versions Noldius agrees:

go, and loose the sackcloth from off thy loins; a token of mourning, and which the prophet wore, as Kimchi thinks, because of the captivity of the ten tribes; and it may be also on account of the miseries that were coming upon the people of the Jews; though some think this was his common garb, and the same with the royal garment the prophets used to wear, Zechariah 13:4 but that he had put off, and had put on sackcloth in its room, which he is now bid to take off:

and put off thy shoe from thy foot; as a sign of distress and mourning also, 2 Samuel 15:30,

and he did so, walking naked and barefoot; Kimchi thinks this was only visionally, or in the vision of prophecy, as he calls it, and not in reality; but the latter seems most probable, and best to agree with what follows; for he was obedient to the divine command, not regarding the disgrace which might attend it, nor the danger of catching cold, to which he was exposed; and hence he has the character of a servant of the Lord, in the next words, and a faithful obedient one he was.