11 And what they who belonged to the God of Abraham? “For the mighty gods of the earth are greatly lifted up.” They who were gods, the people of God, the vineyard of God, whereof it is said, “Judge between Me and My vineyard,” shall go into outer darkness, shall not sit down with Abraham, and Isaac, and Jacob, are not gathered unto the God of Abraham. Wherefore? “For the mighty gods of the earth;” they who were mighty gods of the earth, presuming upon earth. What earth?
Themselves; for every man is earth. For to man was it said, “Dust you are, and unto dust shall you return.” But man ought to presume upon God, and thence to hope for help, not from himself. For the earth rains not upon itself, nor shines for itself; but as the earth from heaven expects rain and light, so man from God ought to expect mercy and truth. They then, “the mighty gods of the earth, were greatly lifted up,” that is, greatly prided themselves: they thought no physician necessary for themselves, and therefore remained in their sickness, and by their sickness were brought down even to death.
The natural branches were broken off that the humble wild olive tree might be grafted in. Hold we fast then, brethren, humility, charity, godliness: since we are called, on their proving reprobate, even by their example let us fear to pride ourselves.
Source: The Enarrations, or Expositions, on the Psalms (New Advent)