CATECHISM OF THE CATHOLIC CHURCH
SECOND EDITION

Paragraphs 2102–2106

2102 "A vow is a deliberate and free promise made to God concerning a possible and better good which must be fulfilled by reason of the virtue of religion," A vow is an act of devotion in which the Christian dedicates himself to God or promises him some good work. By fulfilling his vows he renders to God what has been promised and consecrated to Him. The Acts of the Apostles shows us St. Paul concerned to fulfill the vows he had made.
2103 The Church recognizes an exemplary value in the vows to practice the evangelical counsels:

Mother Church rejoices that she has within herself many men and women who pursue the Savior's self-emptying more closely and show it forth more clearly, by undertaking poverty with the freedom of the children of God, and renouncing their own will: they submit themselves to man for the sake of God, thus going beyond what is of precept in the matter of perfection, so as to conform themselves more fully to the obedient Christ.

The Church can, in certain cases and for proportionate reasons, dispense from vows and promises.

2104 "All men are bound to seek the truth, especially in what concerns God and his Church, and to embrace it and hold on to it as they come to know it." This duty derives from "the very dignity of the human person." It does not contradict a "sincere respect" for different religions which frequently "reflect a ray of that truth which enlightens all men," nor the requirement of charity, which urges Christians "to treat with love, prudence and patience those who are in error or ignorance with regard to the faith."
2105 The duty of offering God genuine worship concerns man both individually and socially. This is "the traditional Catholic teaching on the moral duty of individuals and societies toward the true religion and the one Church of Christ." By constantly evangelizing men, the Church works toward enabling them "to infuse the Christian spirit into the mentality and mores, laws and structures of the communities in which [they] live." The social duty of Christians is to respect and awaken in each man the love of the true and the good. It requires them to make known the worship of the one true religion which subsists in the Catholic and apostolic Church. Christians are called to be the light of the world. Thus, the Church shows forth the kingship of Christ over all creation and in particular over human societies.
2106 "Nobody may be forced to act against his convictions, nor is anyone to be restrained from acting in accordance with his conscience in religious matters in private or in public, alone or in association with others, within due limits." This right is based on the very nature of the human person, whose dignity enables him freely to assent to the divine truth which transcends the temporal order. For this reason it "continues to exist even in those who do not live up to their obligation of seeking the truth and adhering to it."