
Gregory the Great
Catena Aurea · Matthäusevangelium 10
Think not that I am come to send peace on earth: I came not to send peace, but a sword. For I am come to set a man at variance against his father, and the daughter against her. mother, and the daughter in law against her mother in law. And a man’s foes shall be they of his own household.
(Mor. iii. 8.) For the subtle enemy when he sees himself driven out of the hearts of the good, seeks out those who most love them, and speaking by the mouth of those who are dearest, endeavours while the heart is penetrated by love, that the sword of conviction may pierce to the inmost bulwarks of virtue.