17 Recently, as you know, We assigned to the Society of St. Peter the Apostle as its heavenly patroness St. Teresa of the Child Jesus. This Saint who, during her life here below as a religious, made herself responsible for and adopted, if We may use the phrase, more than one missionary in order to assist him in his work as was her custom by her prayers, by voluntary and prescribed corporal penances, but, above all, by offering to her Divine Spouse the dreadful sufferings resulting on the disease with which she was afflicted. Under the protection of the Virgin of Lisieux We, too, look forward to more abundant fruits in this work. We, also, greatly rejoice that many bishops have been pleased to enroll themselves among the perpetual patrons of this Society, and that seminaries and societies of young Catholic men have undertaken the task of meeting the expenses incident on the maintenance and education of several needy native clerical students. These two Societies are customarily called, and rightly so, branches of the principal work of the Society for the Propagation of the Faith. As they were recommended very specially to the bishops by Our Predecessor of happy memory, Benedict XV, in the apostolic letter referred to above, so We also cannot but recommend the same Societies to you, hoping that because of your exhortations and your interest in this work the Catholic people shall never permit themselves to be outdone in generosity by non-Catholics who are wont to assist so liberally the propagators of their false beliefs.
Source: Rerum Ecclesiae (Vatican.va)