Tribulation brings on darkness, prosperity brings light and serenity; for tribulation confuses and confounds the soul, so that it cannot easily see how it ought to act, and thence is provoked to impatience, or to some other sin. But should God, by his divine light, dispel the darkness, the soul at once sees that the tribulation, which in the darkness of the night brought such horrors with it, was temporary and trifling; and sees, at the same time, that tribulation, when God protects us, can not only do us no harm, but even tends marvelously to our good.
[St. Robert Bellarmine, A Commentary on the Book of Psalms, O'Sullivan, tr. Loreto Publications (Fitzwilliam, NH: 2011) p. 53.]