12 Now, even as in this age of ours, temporal goods and the various advantages flowing from them, together with a certain measure of wealth, have been extended somewhat freely to workmen and others hiring out their labour, thereby raising them to a happier condition of life, it must be ascribed to the bounty of the provident and merciful God, that this treasure of the Spiritual Exercises also has been scattered abroad among the common mass of the faithful so as to serve as a counterpoise to hold men back, lest borne down by the weight of fleeting things and immersed in pleasures and delights of life, they fall into the tenets and morals of Materialism. For this reason we cordially commend the works of the Exercises which have spring up already in certain regions, and the exceedingly fruitful and opportune "Retreats for Workmen," together with the associated sodalities of Perseverance; all which, Venerable Brethren, We recommend to your care and solicitude.
Source: Mens Nostra (Vatican.va)