This is an Apostolic Exhortation of Pope John Paul II: written to foster devotion to Saint Joseph, who protects the Mystical Body of Christ as he did the boy Jesus.
"On the occasion of the centenary of Pope Leo XIII's Encyclical Epistle Quamquam Pluries,and in line with the veneration given to St. Joseph over the centuries, I wish to offer for your consideration, dear brothers, and sisters, some reflections concerning him "into whose custody God entrusted his most precious treasures." I gladly fulfill this pastoral duty so that all may grow in devotion to the Patron of the Universal Church and in love for the Savior whom he served in such an exemplary manner.
"In this way the whole Christian people not only will turn to St. Joseph with greater fervor and invoke his patronage with trust, but also will always keep before their eyes his humble, mature way of serving and of "taking part" in the plan of salvation." - From the Introduction.