66 Besides, a tribute of well deserved praise must be paid to the Society which has been providentially founded to provide missionaries with what they need for the sacred ministry. We also express Our paternal approval of those societies of women who so usefully devote themselves to making vestments and altar line. And finally We declare to all Our beloved priests of the whole Church that the work done by the faithful for the salvation of the infidel produces splendid results by way of renewing their own Faith; and an increase of virtue keeps pace with an increase in missionary zeal.
Source: Evangelii Praecones (Vatican.va)