22 There is "marriage honorable in all, and the [nuptial] bed undefiled" (Cf. Hebrews XIII: 4). Tranquil walls resound with no quarreling voices nor do they witness the secret martyrdom which comes when hidden infidelity is laid bare; unquestioning trust turns aside the slings of suspicion; sorrow is assuaged and joy is heightened by mutual affection. Within those sacred precincts children are considered not heavy burdens but sweet pledges of love; no reprehensible motive of convenience, no seeking after sterile pleasure, brings about the frustration of the gift of life nor causes to fall into disuse the sweet names of brother and sister. With what solicitude do the parents take care that the children not only grow in physical vigor but also that, following in the footsteps of their forbears whose memory is often recalled to them, they may shine with the light which profession of the pure faith and moral goodness impart to them. Moved by the numerous benefits received, such children consider it their paramount duty to honor their parents, to be attentive to their desires, to be the staff of their old age, to rejoice their gray hairs with an affection which, unquenched by death, will be made more glorious and more complete in the mansion of Heaven. The members of the Christian family, neither querulous in adversity nor ungrateful in prosperity, are ever filled with confidence in God to Whose sway they yield willing obedience, in Whose will they acquiesce and upon Whose help they wait not in vain.
Source: Sertum Laetitiae (Vatican.va)