In virtue of this catholicity each individual part of the Church contributes through its special gifts to the good of the other parts and of the whole Church. Thus through the common sharing of gifts and through the common effort to attain fullness in unity, the whole and each of the parts receive increase. Not only, then, is the People of God made up of different peoples, but even in its inner structure it is composed of various ranks. This diversity among its members arises either by reason of their duties as is the case with those who exercise the sacred ministry for the good of their brethren, or by reason of their situation and way of life, as is the case with those many who enter the religious state and, tending toward holiness by a narrower path, stimulate their brethren by their example.

Moreover, within the Church particular Churches hold their rightful place. These Churches retain their own Traditions without in any way lessening the primacy of the Chair of Peter. …  Finally, between all the parts of the Church there remains a bond of close communion with respect to spiritual riches, apostolic workers, and temporal resources. For the members of the People of God are called to share these goods, and to each of the Churches the words of the Apostle apply: “According to the gift each has received, administer it to one another as good stewards of the manifold grace of God” (1Pet. 4:10).¹

It is through the sacraments and the exercise of the virtues that the sacred nature and organic structure of the priestly community is brought into operation. Incorporated in the Church through baptism, the faithful are destined by the baptismal character for the worship of the Christian religion; reborn as sons of God they must confess before men the faith which they have received from God through the Church. They are more perfectly bound to the Church by the sacrament of Confirmation, and the Holy Spirit endows them with special strength so that they are more strictly obliged to spread and defend the faith, both by word and by deed, as true witnesses of Christ. Taking part in the Eucharistic sacrifice, which is the fount and apex of the whole Christian life, they offer the Divine Victim to God, and offer themselves along with It. Thus both by reason of the offering and through Holy Communion all take part in this liturgical service, not indeed, all in the same way but each in that way which is proper to himself. Strengthened in Holy Communion by the Body of Christ, they then manifest in a concrete way that unity of the people of God which is suitably signified and wondrously brought about by this most august sacrament.

Those who approach the sacrament of Penance obtain pardon from the mercy of God for the offence committed against Him and are at the same time reconciled with the Church, which they have wounded by their sins, and which by charity, example, and prayer seeks their conversion. By the sacred anointing of the sick and the prayer of her priests the whole Church commends the sick to the suffering and glorified Lord, asking that He may lighten their suffering and save them; she exhorts them, moreover, to contribute to the welfare of the whole people of God by associating themselves freely with the passion and death of Christ. Those of the faithful who are consecrated by Holy Orders are appointed to feed the Church in Christ's name with the word and the grace of God. Finally, Christian spouses, in virtue of the sacrament of Matrimony, whereby they signify and partake of the mystery of that unity and fruitful love which exists between Christ and His Church,(108) help each other to attain to holiness in their married life and in the rearing and education of their children. By reason of their state and rank in life they have their own special gift among the people of God. From the wedlock of Christians there comes the family, in which new citizens of human society are born, who by the grace of the Holy Spirit received in baptism are made children of God, thus perpetuating the people of God through the centuries. The family is, so to speak, the domestic church. In it parents should, by their word and example, be the first preachers of the faith to their children; they should encourage them in the vocation which is proper to each of them, fostering with special care vocation to a sacred state.

Fortified by so many and such powerful means of salvation, all the faithful, whatever their condition or state, are called by the Lord, each in his own way, to that perfect holiness whereby the Father Himself is perfect.²