How to pray, Saint Ignatius
The cares of the pastoral charge of the whole flock of Christ entrusted to Us and Our devotion to the glory and praise of God impel Us to embrace what helps the salvation of souls and their spiritual profit, and cause Us to hearken to those who petition Us for what can foster and nourish piety in the faithful.
So Our beloved son, Francis de Borgia, Duke of Gandia, has lately brought it to Our notice that Our beloved son Ignatius de Loyola, General of the Society of Jesus, erected by Us in Our beloved City and confirmed by Our Apostolic authority, has compiled certain instructions, or Spiritual Exercises, drawn from Holy Writ and from experience in the spiritual life, and has reduced them to an order which is excellently adapted to move piously the souls of the faithful, and that they are very useful and wholesome for the spiritual consolation and profit of the same. This the said Duke Francis has come to know by report from many places and by clear evidence at Barcelona, Valencia and Gandia.
Hence he has humbly begged Us to cause the aforesaid instructions and Spiritual Exercises to be examined, so that their fruit may be more spread, and more of the faithful may be induced to use them with greater devotion. And he has begged Us, should We find them worthy, to approve and praise them and out of Our Apostolic goodness to make other provision in the premisses.
We, therefore, have caused these instructions and Exercises to be examined, and by the testimony of and report made to Us by Our beloved son John Cardinal Priest of the Title of St. Clement, Bishop of Burgos and Inquisitor, Our venerable Brother Philip, Bishop of Saluciae, and Our Vicar General in things spiritual at Rome, and Our beloved son Aegidius Foscararius, Master of Our Sacred Palace, have found that these Exercises are full of piety and holiness and that they are and will be extremely useful and salutary for the spiritual profit of the faithful.