19 Every motive which bolsters and increases confidence in the power of our mighty and kindhearted Virgin Mother to obtain the things we ask for, should act as a powerful incentive generating in us that fiery zeal to pray to her-a zeal We would incite in every Catholic heart. Let each one weigh for himself, moreover, how fitting is this practice and how fruitful to himself; and how acceptable and pleasing to the Blessed Virgin it is bound to be. For, possessing as they do unity of faith, Catholics thus make clear not only that they value this precious gift at its true worth, but also that they intend to hold to it with jealous tenacity. No better way is afforded of proving a fraternal feeling toward their separated brethren than to aid them by every means within their power to recover this, the greatest of all gifts.
Source: Adiutricem (Vatican.va)