Cyprian:
“He allows these things to happen for this reason: that our faith may be tested.”
Clement of Alexandria:
“He who hopes for everlasting rest knows also that the entrance to it is toilsome and narrow. So let him who has once received the Gospel not turn back, like Lot’s wife, as is said – even in the very hour in which he has come to the knowledge of salvation. And let him not go back either to his former life . . . or to heresies.”