I can think of no Church Father who spoke more forcefully or critically about the moral failings of his time than St. John Chrysostom. He did not hesitate to call out the Emperor, or problems within the larger Church. Eventually, his words brought about his exile. Banished to the very edge of the empire, he died in isolation. Writing to the Deaconness Olympia, his closest friend and confidant, he expressed the very heart of Orthodoxy in troubled times:
“Therefore, do not be cast down, I beseech you. For there is only one thing, Olympia, to fear, only one real temptation, and that is sin. This is the refrain that I keep chanting to you ceaselessly. For everything else is ultimately a fable – whether you speak of plots, or enmities, or deceptions, or slanders, or abuses, or accusations, or confiscations, or banishments, or sharpened swords, or high seas, or war engulfing the entire world. Whichever of these you point to, they are transitory and perishable, and they only affect mortal bodies; they cannot in any way injure the watchful soul. This is why, wishing to express the paltriness of both the good and the bad things of this present life, the blessed Paul stated the matter in one phrase, saying, ‘For the things that are seen are transient’ (2 Cor. 4:18).”
From Letter 7, Saint John Chrysostom’s Letters to Saint Olympia.
From Fr. Stephen Freeman’s recent post: Into the Heart of the Capitol