From Pope St. John Paul II’s Apostolic Exhortation Familiaris Consortio (1981):
The family, which is founded and given life by love, is a community of persons: of husband and wife, of parents and children, of relatives. Its first task is to live with fidelity the reality of communion in a constant effort to develop an authentic community of persons.
The inner principle of that task, its permanent power and its final goal is love: without love the family is not a community of persons and, in the same way, without love the family cannot live, grow and perfect itself as a community of persons. What I wrote in the Encyclical Redemptor hominis applies primarily and especially within the family as such: “Man cannot live without love. He remains a being that is incomprehensible for himself, his life is senseless, if love is not revealed to him, if he does not encounter love, if he does not experience it and make it his own, if he does not participate intimately in it.”45
The love between husband and wife and, in a derivatory and broader way, the love between members of the same family—between parents and children, brothers and sisters and relatives and members of the household—is given life and sustenance by an unceasing inner dynamism leading the family to ever deeper and more intense communion, which is the foundation and soul of the community of marriage and the family.