8 Even family life itself, which is the cornerstone of all society and government, necessarily feels and experiences the salutary power of the Church, which redounds to the right ordering and preservation of every State and kingdom. For you know, venerable brethren, that the foundation of this society rests first of all in the indissoluble union of man and wife according to the necessity of natural law, and is completed in the mutual rights and duties of parents and children, masters and servants. You know also that the doctrines of socialism strive almost completely to dissolve this union; since, that stability which is imparted to it by religious wedlock being lost, it follows that the power of the father over his own children, and the duties of the children toward their parents, must be greatly weakened. But the Church, on the contrary, teaches that "marriage, honorable in all,"(13) which God himself instituted in the very beginning of the world, and made indissoluble for the propagation and preservation of the human species, has become still more binding and more holy through Christ, who raised it to the dignity of a sacrament, and chose to use it as the figure of His own union with the Church. Wherefore, as the Apostle has it,(14) as Christ is the head of the Church, so is the man the head of the woman; and as the Church is subject to Christ, who embraces her with a most chaste and undying love, so also should wives be subject to their husbands, and be loved by them in turn with a faithful and constant affection. In like manner does the Church temper the use of parental and domestic authority, that it may tend to hold children and servants to their duty, without going beyond bounds. For, according to Catholic teaching, the authority of our heavenly Father and Lord is imparted to parents and masters, whose authority, therefore, not only takes its origin and force from Him, but also borrows its nature and character. Hence, the Apostle exhorts children to "obey their parents in the Lord, and honor their father and mother, which is the first commandment with promise";(15) and he admonishes parents: "And you, fathers, provoke not your children to anger, but bring them up in the discipline and correction of the Lord."(16) Again, the apostle enjoins the divine precept on servants and masters, exhorting the former to be "obedient to their lords according to the flesh of Christ . . . with a good will serving, as to the Lord"; and the latter, to "forbear threatenings, knowing that the Lord of all is in heaven, and there is no respect of persons with God."(17) If only all these matters were faithfully observed according to the divine will by all on whom they are enjoined, most assuredly every family would be a figure of the heavenly home, and the wonderful blessings there begotten would not confine themselves to the households alone, but would scatter their riches abroad through the nations."
Source: Quod Apostolici Muneris (Vatican.va)