29 “Instead of your fathers, children are born to you”. Nothing can be more manifest. Now consider the “Temple of the King” itself, for it is on its behalf he speaks, on account of the unity of the body that is spread throughout all the world: for those very persons who have chosen to be virgins, cannot find favour with the King unless they be led into the Temple of the King. “Instead of your fathers, are your children born to you.” It was the Apostles begot you: they were “sent:” they were the preachers: they are “the fathers.”
But was it possible for them to be with us in the body for ever? Although one of them said, “I desire to depart, and to be with Christ, which is far better: to abide in the flesh is necessary for your sakes.” It is true he said this, but how long was it possible for him to remain here? Could it be till this present time, could it be to all futurity? Is the Church then left desolate by their departure? God forbid. “Instead of your fathers, children have been born to you.” What is that?
The Apostles were sent to you as “fathers,” instead of the Apostles sons have been born to you: there have been appointed Bishops. For in the present day, whence do the Bishops, throughout all the world, derive their origin? The Church itself calls them fathers; the Church itself brought them forth, and placed them on the thrones of “the fathers.” Think not yourself abandoned then, because you see not Peter, nor see Paul: see not those through whom thou were born. Out of your own offspring has a body of “fathers” been raised up to you.
“Instead of your fathers, have children been born to you.” Observe how widely diffused is the “Temple of the King,” that “the virgins that are not led to the Temple of the King,” may know that they have nothing to do with that marriage. “You shall make them princes over all the earth.” This is the Universal Church: her children have been made “princes over all the earth:” her children have been appointed instead of the “fathers.” Let those who are cut off own the truth of this, let them come to the One Body: let them be led into the Temple of the King. God has established His Temple everywhere: has laid everywhere “the foundations of the Prophets and Apostles.” The Church has brought “forth sons;” has made them “instead of her fathers” to be “princes over all the earth.”
Source: The Enarrations, or Expositions, on the Psalms (New Advent)