42 To sum up all in a few words, there would be a calm and quiet constancy in marriage if married people would gather strength and life from the virtue of religion alone, which imparts to us resolution and fortitude; for religion would enable them to bear tranquilly and even gladly the trials of their state, such as, for instance, the faults that they discover in one another, the difference of temper and character, the weight of a mother's cares, the wearing anxiety about the education of children, reverses of fortune, and the sorrows of life.
Source: Arcanum Divinae (Vatican.va)