He pours out contempt on nobles and disarms the mighty.
This is a noble discourse of Job's concerning the wisdom, power, and sovereignty of God, in ordering and disposing of all the affairs of the children of men, according to the counsel of his own will, which none dares gainsay or can resist.
Commenting on Job 12:12-25
He discovereth deep things out of darkness,.... The deep things of God, his own deep things which lie in his heart, wrapped up in darkness impenetrable to creatures, and which could never be known unless he had discovered them; such as the thoughts of his heart, which are very deep, Psa 92:5; the deep things of God, which the Spirit of God only knows, searches...
job 12:21Psa 107:40 quotes, in its first clause, this verse and, in its second, Job 12:24. weakeneth the strength--literally, "looseth the girdle"; Orientals wear flowing garments; when active strength is to be put forth, they gird up their garments with a girdle. Hence here--"He destroyeth their power" in the eyes of the people.