John Cassian
Patristic
c. A.D. 360–435
“Although we say that trial is twofold, that is, in prosperity and in adversity, yet you must know that all people are tried in three different ways. Often they are tried for their probation, sometimes for their improvement, and in some cases because their sins deserve it. For their probation indeed! We read that the blessed Abraham and Job and many of the saints endured countless tribulations.… For improvement, because God chastens his righteous ones for some small and venial sins or to raise them to a higher state of purity, and he delivers them over to various trials that he may purge away all their unclean thoughts, and, to use the prophet's word, the "dross," which he sees to have collected in their secret parts. Thus may he transmit them like pure gold to the judgment to come, as he allows nothing to remain in them for the fire of judgment to discover when hereafter it searches them with penal torments according to this saying: "Many are the tribulations of the righteous." … To whom under the figure of Jerusalem the following words are spoken by Jeremiah, in the person of God: "I will make a full end of all the nations among whom I scattered you, but of you I will not make a full end. I will discipline you in just measure, and I will by no means leave you unpunished." … But as a punishment for sins, the blows of trial are inflicted, as where the Lord threatens that he will send plagues on the people of Israel: "I will send the teeth of beasts on them, with the fury of creatures that trail on the ground," and "In vain have I struck your children. They have not received correction." … We find, it is true, a fourth way also in which we know on the authority of Scripture that some sufferings are brought on us simply for the manifestation of the glory of God and his works, according to these words of the Gospel: "Neither did this man sin nor his parents, but that the works of God might be manifested in him," and again, "This sickness is not to death, but for the glory of God that the Son of God may be glorified by it." … The perfect person will always remain steadfast in either kind of trial; now let us return to it once more.”