Marcos 13
Ambrose of Milan · Comentário Patrístico (catena)
Marcos 13:24
And just as when the moon is in opposition to the sun, it disappears through the regular flow of the menstrual cycle or through the alignment of the earth, so too the holy Church, when the vices of the flesh oppose the heavenly light, cannot receive the divine radiance of Christ's rays. For in persecutions, the love of this life often excludes the light of God alone. The stars will fall, those certainly shining with the glory of resurrection, those men like luminaries in the world holding the word of life, those men of whom it was said to Abraham, 'For as the sky shines and the stars, so shall his descendants be' (Gen. XIII, 16). Therefore, the patriarchs will fall to men, the prophets will fall, if the bitterness of persecution increases: which must happen until the Church is filled with all virtues and fullness in each; for in this way the good are proven, the weak are revealed. — Commentary on Luke, Book 10
Marcos 13:31
For just as he calls the things that are not as though they were, so he has made things future as though they were. It cannot come to pass that they should not be. Those things that he has directed to be necessarily will be. Therefore he who has made the things that are to be, knows them already in the way in which they are to be. — Exposition of the Christian Faith 5.4.192