Gregory the Great, on Matt 13:31

“Another parable he proposed unto them, saying: The kingdom of heaven is like to a grain of mustard seed, which a man took and sowed in his field.”

“(ubi sup.) The birds lodge in its branches, when holy souls that raise themselves aloft from thoughts of earth on the wings of the virtues, breathe again from the troubles of this life in their words and comfortings.”

Imported from an open dataset — not yet checked against the printed edition.