He looses the bonds of kings, and girds their loins with a waistband.
All Commentaries on Job 12:18 Go To Job 12
Gregory The Dialogist
AD 604
21. They that know how to regulate aright the motions of their members, are not unjustly called ‘kings.’ But when the mind is touched with pride on the grounds of that very continence, it very often happens that Almighty God, deserting its pride, suffers it to fall into uncleanness of practice. And so ‘He looseth the belt of kings,’ when in the case of those who seemed to regulate their members aright, on account of the sin of pride he undoes the girdle of chastity. Now what is meant by ‘a cord,’ but sin? As Solomon says, His own iniquities shall take the wicked himself, and he shall be holden with the cords of his sins. [Prov. 5, 22] And because fleshly gratification has its dominion in the ‘reins,’ the strict Judge of the conscience, Who ‘looseth the belt of kings,’ ‘girdeth their reins with a cord,’ that, when the girdle of chastity is undone, then the gratification of sin should have dominion over their members, so that those whom pride pollutes in secret, He may shew even publicly to be as abominable as they are.