25. For whilst the Jewish people continued in the precept of the Law, and the whole Gentile world knew nothing of the precepts of God, both the former seemed to be as ‘Princes’ by faith, and the latter lay borne down in the depth by unbelief. But when Judaea denied the mystery of our Lord’s Incarnation, and the Gentile world believed it, both ‘the princes’ fell into contempt, and they that had been borne down in the sin of unbelief, were ‘lifted up’ in the liberty of true faith. But Jeremiah seeing this fall of the Israelites long before, says, The Lord is become as it were an enemy; He hath swallowed up Israel; He hath thrown down all his palaces; He hath destroyed his bulwarks. [Lam. 2, 5] Now ‘palaces’ in cities are for ornaments, but the ‘bulwarks’ are for defence. And the gifts that keep us safe are one thing, those that ornament us are another. For prophetical teaching, different kinds of tongues, the power of working cures, are a kind of ‘palaces’ of the mind, which though...
“By changing the speech of those who speak truly.” He is not referring here to those who speak truly, so much as to those who believe they speak truly. He convinces them of their falsehood when he makes what they had predicted happen in a different way.
“By taking away the doctrine of the elders,” Job shows them that the frustration of their projects occurs without any consideration for their authority. “He pours contempt on princes,” both those who are entrusted with teaching and the leaders who take care of the administration of common goods. When God opposes them, they lose completely the high position they previously had where they stood. “He lifts up those who were oppressed.” After showing what God can do to these people, who are considered to be illustrious, he includes the wealth and protection he can grant to the humble, so that the divine power may be known by both these classes of people. - "Exposition on the Book of Job 12.20–21"