-- Tobit 12:6-14a
All religious, whether exempt or not, take their place among the collaborators of the diocesan bishop in his pastoral duty. From the outset of the work of evangelization, the missionary "planting" and expansion of the Church require the presence of the religious life in all its forms. "History witnesses to the outstanding service rendered by religious families in the propagation of the faith and in the formation of new Churches: from the ancient monastic institutions to the medieval orders, all the way to the more recent congregations."
-- CCC 927