70 Here We should like to mention those who are in charge of the Propagation of the Faith in every country, whose work you will assist if you support the diocesan branches of this society. We also call to mind the superiors of the highly deserving missionary congregations to whom this Holy See constantly appeals for help in the more pressing needs of the mission countries. They will be unable to increase the number of their vocations unless the local Ordinaries give them friendly support. Take pains to reconcile your individual interests after careful consideration and a genuinely mutual agreement. If these interests seem for the moment to be divergent, why not weigh them again in the light of a strong and lively faith, keeping the supernatural motives of the unity and catholicity of the Church ever before your eyes.?
Source: Fidei Donum (Vatican.va)