27 First of all, you should make known and even explain with all diligence this encyclical both to your clergy and to the people committed to your care. Particularly We are most desirous that you do all in your power to call back the faithful to their duty of practicing the obligations and virtues proper to each one's state in life, since even in our own times the number is very large who never think of eternity and who neglect almost totally the salvation of their souls. Some are so immersed in business that they think of nothing but accumulating riches and, by consequences, the spiritual life ceases to exist for them. Others give themselves up entirely to the satisfaction of their passions and thus fall so low that they, with difficulty if at all, are able to appreciate anything which transcends the life of sense. Finally, there are many who give their every thought to politics, and this to such an extent, that while they are completely devoted to the welfare of the public, they forget altogether one thing, the welfare of their own souls. Because of these facts, Venerable Brothers, do you endeavor, following the example of St. Francis, to instruct thoroughly the faithful in the truth that holiness of life is not the privilege of a select few. All are called by God to a state of sanctity and all are obliged to try to attain it. Teach them, too, that the acquisition of virtue, although it cannot be done without much labor (such labor has its own compensations, the spiritual consolations and joys which always accompany it) it is possible for everyone with the aid of God's grace, which is never denied us.
Source: Rerum Omnium Perturbationem (Vatican.va)