7 Very great was the wound of man's nature; from the feet to the head there was no soundness in it; none could apply mollifying ointment, neither oil, nor bandages. Then bewailing and wearying themselves, the Prophets said, Who shall give salvation out of Sion? And again, Let Your hand be upon the man of Your right hand, and upon the son of man whom You made strong for Yourself: so will not we go back from You. And another of the Prophets entreated, saying, Bow the heavens, O Lord and come down. The wounds of man's nature pass our healing. They slew Your Prophets, and cast down Your altars. The evil is irretrievable by us, and needs you to retrieve it.
Source: Catechetical Lectures (New Advent)