Thought from Today's Old Testament Passage:
[Isa. 3:1-8] The prophet, in the close of the foregoing chapter, had given a necessary caution to all not to put confidence in man, or any creature; he had also given a general reason for that caution, taken from the frailty of human life and the vanity and weakness of human powers. Here he gives a particular reason for it—God was now about to ruin all their creature-confidences, so that they should meet with nothing but disappointments in all their expectations from them (v. 1): The stay and the staff shall be taken away, all their supports, of what kind soever, all the things they trusted to and looked for help and relief from. Their church and kingdom had now grown old and were going to decay, and they were (after the manner of aged men, Zec. 8:4) leaning on a staff: now God threatens to take away their staff, and then they must fall of course, to take away the stays of both the city and the country, of Jerusalem and of Judah, which are indeed stays to one another, and, if one fail, the other feels from it. He that does this is the Lord, the Lord of hosts—Adon, the Lord that is himself the stay or foundation; if that stay depart, all other stays certainly break under us, for he is the strength of them all. He that is the Lord, the ruler, that has authority to do it, and the Lord of hosts, that has the ability to do it, he shall take away the stay and the staff.
Matthew Henry, Matthew Henry's Commentary on the Bible (Peabody, MA: Hendrickson Publishers), 1997.