70 Here We should like to address a particularly affectionate word to Our Catholic workingmen, young and old. They have been given, perhaps as a reward for their often heroic fidelity in these trying days, a noble and an arduous mission. Under the guidance of their Bishops and priests, they are to bring back to the Church and to God those immense multitudes of their brother-workmen who, because they were not understood or treated with the respect to which they were entitled, in bitterness have strayed far from God. Let Catholic workingmen show these their wandering brethren by word and example that the Church is a tender Mother to all those who labor and suffer, and that she has never failed, and never will fail, in her sacred maternal duty of protecting her children. If this mission, which must be fulfilled in mines, in factories, in shops, wherever they may be laboring, should at times require great sacrifices, Our workmen will remember that the Savior of the world has given them an example not only of toil but of self immolation.
Source: Divini Redemptoris (Vatican.va)