Cyril of Alexandria — as excerpted in the Catena Aurea on Luke 12:49-53

“What sayest thou, O Lord? Didst thou not come to give peace, Who art made peace for us? (Eph. 2:14.) making peace by Thy cross with things in earth and things in heaven; (Col. 1:20.) Who saidst, My peace I give unto you. (John 14:27.) But it is plain that peace is indeed a good, but sometimes hurtful, and separating us from the love of God, that is, when by it we unite with those who keep away from God. And for this reason we teach the faithful to avoid earthly bonds. Hence it follows, For from henceforth there shall be five in one house divided, three against two, &c.”