The mission of the Institute rests on three pillars:
- The sanctification of priests through fidelity to the traditional liturgy of the Roman Church (the Mass of all time, the Roman Breviary, the traditional sacraments).
- The apostolate in the service of souls in a spirit of Salesian charity and gentleness: preaching, confessions, pastoral visits, retreats.
- The cultivation of sacred beauty as a path of access to mystery: Gregorian chant, polyphony, architecture, sacred arts — beauty is at the service of holiness.