Gregory the Great, on 1John 3:17

“He that hath the substance of this world, and shall see his brother in need, and shall shut up his bowels from him: how doth the charity of God abide in him?”

“But behold, no one persecutes us even unto death. How then can we prove whether we love our enemies? Yet there is something that ought to be done in the peace of holy Church, by which it may become clear whether we would be able to die for love in a time of persecution. Certainly the same John says: "He who has the substance of this world, and sees his brother in need, and closes his heart against him, how does the love of God remain in him?" Hence also John the Baptist says: "He who has two tunics, let him give to him who has none." Therefore, he who in a time of tranquility does not give his tunic for God, when will he give his life in persecution? Therefore, let the virtue of charity, that it may be unconquered in disturbance, be nourished through mercy in tranquility, so that one may first learn to spend one's possessions for almighty God, and afterward oneself.”

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