Luke 21:19

There are also other wars which the Christian wages, the struggles of different lusts, and the conflicts of the will; and domestic foes are far more dangerous than foreign.

Jesus gives them clear and evident signs of the time when the consummation of the world draws near. He says that there will be wars, turmoil, famines and epidemics everywhere. There will be terrors from heaven and great signs. As another Evangelist says, "All the stars shall fall, and the heaven be rolled up like a scroll, and its powers will be shaken."In the middle of this, the Savior places what refers to the capture of Jerusalem. He mixes the accounts together in both parts of the narrative. Before all these things, he says, "They will lay their hands on you and persecute you, delivering you up to synagogues and to prisons and bringing you before kings and rulers for my name's sake. This will be a witness to you." Before the times of consummation, the land of the Jews was taken captive, and the Roman armies overran it. They burned the temple, overthrew their national government, and stopped the means for legal worship. They no longer had sacrifices, now that the temple was destroyed. The country of the Jews together with Jerusalem itself was totally laid waste. Before these things happened, they persecuted the blessed disciples. They imprisoned them and had a part in unendurable trials. They brought the disciples before judges and sent them to kings. Paul was sent to Rome to Caesar.… Christ promises, however, that he will deliver them certainly and completely. He says that a hair of your head will not perish.

For the Almighty God Himself will raise us up through our Lord Jesus Christ, according to His infallible promise, and grant us a resurrection with all those that have slept from the beginning of the world; and we shall then be such as we now are in our present form, without any defect or corruption. For we shall rise incorruptible: whether we die at sea, or are scattered on the earth, or are torn to pieces by wild beasts and birds, He will raise us by His own power; for the whole world is held together by the hand of God. Now He says: "An hair of your head shall not perish." Wherefore He exhorts us, saying: "In your patience possess ye your souls."

"In your patience you shall possess your souls." The possession of the soul is placed in the virtue of patience because patience is the root and guardian of all virtues. Through patience we truly possess our souls, because while we learn to master ourselves, we begin to possess that very thing which we are. Patience, however, is to endure the evils of others with equanimity, and to feel no sting of resentment even against the one who inflicts the evils. For whoever bears the evils of a neighbor in such a way that he nevertheless grieves silently and seeks an opportunity for fitting retribution does not display patience but merely shows it outwardly. For it is written: "Love is patient, love is kind." It is patient so as to bear the evils of others, and kind so as to love even those whom it bears. Hence Truth says through Himself: "Love your enemies, do good to those who hate you, pray for those who persecute and slander you." It is therefore a virtue before men to tolerate adversaries, but the virtue before God is to love them, because God accepts only that sacrifice which the flame of charity kindles before His eyes on the altar of good works. But it should be known that very often we seem to be patient only because we cannot repay evils. But whoever does not repay evil because he is unable to, without doubt, as we said, is not patient, because patience is sought not in outward show but in the heart. Through the vice of impatience, doctrine itself, the nurse of virtues, is scattered. For it is written: "A man's learning is known through patience." Therefore, the less patient anyone is shown to be, the less learned he is shown to be. […]

(Mor. 5. c. 16.) He who preserves patience in adversity, is thereby rendered proof against all affliction, and so by conquering himself, he gains the government of himself; as it follows, In your patience shall ye possess your souls. For what is it to possess your souls, but to live perfectly in all things, and sitting as it were upon the citadel of virtue to hold in subjection every motion of the mind? (Hom. 35. in Ev.) By patience then we possess our souls, because when we are said to govern ourselves, we begin to possess that very thing which we are. But for this reason, the possession of the soul is laid in the virtue of patience, because patience is the root and guardian of all virtues. Now patience is to endure calmly the evils which are inflicted by others, and also to have no feeling of indignation against him who inflicts them.