Fr Callan and Fr McHugh talk about patience regulating sadness in their work “Moral Theology” (the work has the nihil obstat and imprimatur):
Patience.— Patience is a virtue which from the love of moderation so controls the sadness caused by present afflictions that this passion neither excessively disturbs the internal powers of the soul nor produces anything inordinate in the external conduct. Hence it differs from the following:
(a) from temperance, for, although temperance also regulates sadness, the sadness with which it deals is caused by lack of pleasures, while that with which patience deals is caused by the presence of evils, especially of those brought on by annoyances from others;
(b) from the endurance of fortitude, for fortitude regulates fear of death, while patience regulates sadness caused by evils of whatever nature, such as sickness, bereavements, loss of money, persecution;
(c) from longsuffering and constancy, for the matter of these virtues is a good which cannot be obtained except by long waiting or a good which must be continually exercised, whereas the matter of patience is an evil that has to be endured in the present. But since the delay of a desired good causes sadness (Prov., xiii. 12), and since continuance in good is irksome to the flesh, both longsuffering and constancy are included under patience.
The Greatness of Patience.— (a) Its Rank.— Patience is less than the theological virtues, and also is inferior to prudence and justice, which perfect one in goodness; it is also less than fortitude and temperance, which preserve from the greatest impediments to goodness; for the office of patience is only to preserve one from lesser impediments, namely, the common adversities of life. But, on the other hand, patience is a part of fortitude—a potential part, because it does not connote the supreme heroism of fortitude, and an integral part, because courage in the face of death is bettered by the serenity which patience imparts.
(b) Its Necessity.— Patience is a most useful virtue. Without it one cannot long continue in the way of virtue on account of the many trials man encounters (Heb., x. 36), whereas with it the enemies of other virtues are destroyed; and hence it is called the root and guardian of virtue (cfr. Rom., v. 3, 4; James, i. 2-4; Luke, xxi. 19). But there are degrees of patience: the lowest is equanimity, which offends God neither in thought, word nor deed even though sorely tried (Job, ii. 7-10); a higher degree is submission, which prefers adversity to prosperity (Ps. cxviii. 71); the highest degree is joyful resignation, which smiles at grief and rejoices in tribulation (II Cor., xii. 10, vii. 4).
continued….