(7) Concerning this.--Better, it, or her--i.e., Egypt.

Their strength is to sit still.--The Authorised version fairly gives the meaning: "Their boasted strength will be found absolute inaction." but the words, as Isaiah wrote or spoke them, had a more epigrammatic point--"Rahab, they are sitting still." He uses the poetical name for Egypt which we find in Isaiah 51:9; Job 26:12; Psalm 87:4; Psalm 89:10, and which conveyed the idea of haughty and inflated arrogance. "Rahab sitting still" was one of those mots which stamp themselves upon a nation's memory, just as in modern times the Bourbons have been characterised as "learning nothing, forgetting nothing," or Bismarck's policy as one of "blood and iron." It was, so to speak, almost a political caricature.

Verse 7. - Therefore have I cried concerning this. Their strength is to sit still. No modern critic accepts this interpretation. Most translate, "Wherefore I name it" (i.e. Egypt) "Rahab, that sits still;" or "Arrogance, that 'sits still." Rahab, "pride" or 'arrogance," would seem to have been an old name for Egypt (Job 26:12; Psalm 87:4; Psalm 89:10; Isaiah 51:9), not one given at this time by Isaiah. What he means to say is, "Proud as thou art, thou doest nothing to maintain thy pride, but art content with sitting still." This he "cries" or "proclaims" concerning Egypt, as the most important thing for other nations to know about her.

30:1-7 It was often the fault and folly of the Jews, that when troubled by their neighbours on one side, they sought for succour from others, instead of looking up to God. Nor can we avoid the dreadful consequences of adding sin to sin, but by making the righteousness of Christ our refuge, and seeking for the sanctification of the Holy Spirit. Men have always been prone to lean to their own understandings, but this will end in their shame and misery. They would not trust in God. They took much pains to gain the Egyptians. The riches so spent turned to a bad account. See what dangers men run into who forsake God to follow their carnal confidences. The Creator is the Rock of ages, the creature a broken reed; we cannot expect too little from man, or too much from God. Our strength is to sit still, in humble dependence upon God and his goodness, and quiet submission to his will.For the Egyptians shall help in vain, and to no purpose,.... Not sending help in time, or such as did no service; though they made a show of help, and attempted to help them, or seemed to do so, yet failed to do it:

therefore have I cried; proclaimed or published, either the Lord by the prophet, or the prophet in the name of the Lord, which is much the same:

concerning this, Their strength is to sit still; either concerning this embassy, that it would have been better for the ambassadors to have spared all their toil, and labour, and strength, in going down to Egypt, and have remained quiet and easy in their own country: or, "I cried, or called, to this (i)", this city of Jerusalem, and the inhabitants of it, and declared to them, that it was best for them quietly to trust in the Lord, and depend upon his protection, and sit still in Jerusalem, and not attempt to flee from thence to Egypt for safety, and they should see the salvation of God, as in Exodus 14:13 to which some think there is an allusion; not but that they might be busy, and employ themselves in preparing for their defence, by providing themselves with arms, and repairing their fortification; but it was not right to go out of the city, and seek a foreign aid or safety. The word for "strength" is "Rahab", one of the names of Egypt, Psalm 87:4 and so the sense may be, their "Rahab", their "Egypt", or what they expect from thence, namely, protection and safety, is to sit still, and abide quietly at Jerusalem. Jarchi refers this to Egypt, "I have called to this", to Egypt, they are of a proud spirit, the people cease, and are proud without cause; or according to another exposition he gives, their pride ceaseth, or it is fit it should. De Dieu interprets it also of Egypt; and so does Gussetius (k), but in a different manner, thus, the Egyptians are strength as to rest, they will strongly rest, while Israel strongly hopes they will help them.

(i) "vocavi ad hanc", Montanus; "ad istam clamo", Castalio. (k) Comment. Ebr. p. 829.