20 But that this also introduces arguments for the resurrection, hear the same Paul again, saying, “If after the manner of men I have fought with beasts at Ephesus, what shall it profit me if the dead are not raised.” And further, “If in this life only we have hope, we are of all men the most miserable.” We suffer, he tells us, innumerable evils during the present life; if then there is no other life to be hoped for, what can be more wretched than our condition? Hence it is evident that our affairs are not bounded within the limits of this present state; and this becomes manifest from our trials.
For God could never suffer those who have endured so many and so great evils, and who have spent all the present life in trials and dangers without number, to be without a recompense of far greater gifts; and if he could not suffer this, it is certain that he has prepared another, a better and brighter life, in which he will crown those who have wrestled in the cause of godliness, and proclaim their praises in the presence of the whole world. So that when you see a just man straitened and afflicted; and in sickness, and in poverty, as well as innumerable other woes, till he ends this present life; say to yourself, that if there were no resurrection and judgment, God would not have permitted one, who endured such great evils for His sake, to depart hence without enjoying any good thing; from whence it is evident, that for such He has prepared another life, and one which is sweeter and much more endurable.
For if it were not so, then he would not suffer many of the wicked to luxuriate through the present life; and many of the just to remain in ten thousand ills: but since there is provided another life, in which he is about to recompense every man according to his deserts; one for his wickedness, another for his virtue; on that account he forbears, while he sees the former enduring evil, and the latter living in luxury.
Source: Homilies on the Statues (New Advent)