Gregory the Great
Catena Aurea · Matthäusevangelium 13
Jesus saith unto them, Have ye understood all these things? They say unto him, Yea, Lord. Then said he unto them, Therefore every Scribe which is instructed unto the kingdom of heaven is like unto a man that is an householder, which bringeth forth out of his treasure things new and old.
(ubi sup.) Otherwise; The things old are, that the human race for its sin should suffer in eternal punishment; the things new, that they should be converted and live in the kingdom. First, He brought forward a comparison of the kingdom to a treasure found and a pearl of price; and after that, narrated the punishment of hell in the burning of the wicked, and then concluded with Therefore every Scribe, &c. as if He had said, He is a learned preacher in the Church who knows to bring forth things new concerning the sweetness of the kingdom, and to speak things old concerning the terror of punishment; that at least punishment may deter those whom rewards do not excite.