Fidei Donum §57

⁵⁷ We might ask, further, whether our prayers come from a sincere heart if we pray for the success of the missions without accompanying our prayers with charitable offerings in accordance with our means. We are well acquainted - in fact, better than anyone else - with the profuse liberality of Our sons, as many wonderful examples constantly testify. To these generous souls is due, beyond a doubt, the marvelous growth of our missions since the beginning of this century. In consequence We desire to express Our profound gratitude to those beloved sons and daughters of Ours who contribute their zealous efforts and charitable support to many missionary enterprises.