When I am here, I do not fast on Saturday; when at Rome, I do fast on Saturday.

Spiritalis enim virtus sacramenti ita est ut lux: etsi per immundos transeat, non inquinatur.

Translated: The spiritual virtue of a sacrament is like light,-although it passes among the impure, it is not polluted.

Thus, in this universal catastrophe, the sufferings of Christians have tended to their moral improvement, because they viewed them with eyes of faith.