Ambrose of Milan — as excerpted in the Catena Aurea on Luke 5:17-26

“Mighty is the Lord who pardons one man for the good deed of another, and while he approves of the one, forgives the other his sins. Why, O man, with thee does not thy fellowman prevail, when with God a servant has both the liberty to intercede in thy behalf, and the power of obtaining what he asks? If thou despairest of the pardon of heavy sins, bring the prayers of others, bring the Church to pray for thee, and at sight of this the Lord may pardon what otherwise He might deny to thee.”