Opus Dei’s establishment as a personal prelature was a seminal event in the life of the Church, with important implications for every Catholic. Now three theologians and members of Opus Dei — Pedro Rodriguez, Fernando Ocáriz, and José Luis Illanes — explore the significance of Opus Dei and its place in the Church as a whole. They examine Opus Dei’s mission in the context of the Church’s larger work, plus a host of related issues: the vocation to Opus Dei in relation to the Church’s vocation to holiness; the nature of that vocation for people in different states in life; the proper role of the Christian in the secular world and Opus Dei’s call for the sanctification of ordinary life; and much more. Here, then, is an in-depth guide to understanding the role and importance of this key apostolate.