3 Accordingly following in the footsteps of these Pontiffs, We have deemed it fitting to do somewhat in like manner Ourselves, and establish something most excellent, which will, we trust, prove a source of many rare advantages to the Christian people, We are speaking of the practice of the Spiritual Exercises, which we earnestly desire to see daily extended more widely, not only among the clergy both secular and regular, but also among the multitudes of the Catholic laity; and it is Our pleasure to bequeath this to our beloved children as a memorial of this Holy Year. And we do this the more gladly at the end of the fiftieth year since Our first offering of the Divine Sacrifice. For nothing can be more pleasing to us than the recollection of the heavenly graces and the unutterable consolations which we have often experienced when occupied in the Spiritual Exercises; and of the diligence we devoted to the sacred retreats, marking our priestly course, as it were, by so many stages; of the light and the impulse that we drew from them, enabling us to know the divine will and to fulfil it; and lastly of the labour therein bestowed, in the whole course of our priestly life, on instructing our neighbours in heavenly things, and that so fruitfully and successfully, that we may rightly conclude that a singular resource for the eternal salvation of souls is set in the Spiritual Exercises.
Source: Mens Nostra (Vatican.va)