Glory in Afflictions:

When then neither loss of money, nor slander, nor railing, nor banishment, nor diseases, nor tortures, nor that which seems more formidable than all, namely death, harms those who suffer them, but rather adds to their profit, whence can you prove to me that any one is injured when he is not injured at all from any of these things? For I will endeavour to prove the reverse, showing that they who are most injured and insulted, and suffer the most incurable evils are the persons who do these things. For what could be more miserable than the condition of Cain, who dealt with his brother in this fashion? what more pitiable than that of Phillip's wife who beheaded John? or the brethren of Joseph who sold him away, and transported him into the land of exile? or the devil who tortured Job with such great calamities? For not only on account of his other iniquities, but at the same time also for this assault he will pay no trifling penalty. Dost thou see how here the argument has proved even more than was proposed, shewing that those who are insulted not only sustain no harm from these assaults, but that the whole mischief recoils on the head of those who contrive them? For since neither wealth nor freedom, nor life in our native land nor the other things which I have mentioned, but only right actions of the soul, constitute the virtue of man, naturally when the harm is directed against these things, human virtue itself is no wise harmed. What then? supposing some one does harm the moral condition of the soul? Even then if a man suffers damage, the damage does not come from another but proceeds from within, and from the man himself. "How so," do you say? When any one having been beaten by another, or deprived of his goods, or having endured some other grievous insult, utters a blasphemous speech, he certainly sustains a damage thereby, and a very great one, nevertheless it does not proceed from him who has inflicted the insult, but from his own littleness of soul. For what I said before I will now repeat, no man if he be infinitely wicked could attack any one more wickedly or more bitterly than that revengeful demon who is implacably hostile to us, the devil: but yet this cruel demon had not power to upset or overthrow him who lived before the law, and before the time of grace, although he discharged so many and such bitter weapons against him from all quarters. Such is the force of nobility of soul. And what shall I say of Paul? Did he not suffer so many distresses that even to make a list of them is no easy matter? He was put in prison, loaded with chains, dragged hither and hither, scourged by the Jews, stoned, lacerated on the back not only by thongs, but also by rods, he was immersed in the sea, oftentimes beset by robbers, involved in strife with his own countrymen, continually assailed both by foes and by acquaintance, subjected to countless intrigues, struggling with hunger and nakedness, undergoing other frequent and lasting mischances and afflictions: and why need I mention the greater part of them? he was dying every day: but yet, although subjected to so many and such grievous sufferings, he not only uttered no blasphemous word, but rejoiced over these things and gloried in them: and one time he says "I rejoice in my sufferings," and then again "not only this but we also glory in afflictions." If then he rejoiced and gloried when suffering such great troubles what excuse will you have, and what defence will you make if you blaspheme when you do not undergo the smallest fraction of them.
(St. John Chrysostom, A TREATISE TO PROVE THAT NO ONE CAN HARM THE MAN WHO DOES NOT INJURE HIMSELF)