One can be incorporated in the Opus Dei Prelature as an associate, a numerary or a supernumerary. Associates and numeraries commit themselves to celibacy; supernumeraries do not. But all the faithful of the Prelature share the same vocation of spreading the ideal of holiness in the middle of the world.

Most members are married, and they strive to follow Jesus Christ by sanctifying their work both in the home and outside, maintaining a youthful love, generously receiving the children God sends them, educating their children well and transmitting the faith to them with their charity and their example.

For apostolic motives, some lay men and women embrace celibacy as a gift from God. This enables them to dedicate themselves more to tasks of formation, without any change in their lay condition, their professional situation, or their position within the Church and society.