Romans 5:3

Now, consider how great the things to come are, when even at things that seem to be distressful we can be elated; so great is God's gift, and such a nothing any distastefulness in them! For in the case of external goods, the struggle for them brings trouble and pain and irksomeness along with it; and it is the crowns and rewards that carry the pleasure with them. But in this case it is not so, for the wrestlings have to us no less relish than the rewards. For since there were sundry temptations in those days, and the kingdom existed in hopes, the terrors were at hand, but the good things in expectation, and this unnerved the feebler sort, even before the crowns he gives them the prize now, by saying that we should "glory even in tribulations." And what he says is not "you should glory," but we glory, giving them encouragement in his own person. Next since what he had said had an appearance of being strange and paradoxical, if a person who is struggling in famine, and is in chains and torments, and insulted, and abused, ought to glory, he next goes on to confirm it. And (what is more), he says they are worthy of being gloried in, not only for the sake of those things to come, but for the things present in themselves. For tribulations are in their own selves a goodly thing. How so? It is because they anoint us unto patient abiding. Wherefore after saying we glory in tribulations, he has added the reason, in these words, "Knowing that tribulation worketh patience." Notice again the argumentative spirit of Paul, how he gives their argument an opposite turn. For since it was tribulations above all that made them give up the hopes of things to come, and which cast them into despondency, he says that these are the very reasons for confidingness, and for not desponding about the things to come, for "tribulation," he says, "worketh patience."