The Spiritual Exercises is not a book to be read. It is a manual for the person giving the retreat, telling him what to propose and when to say nothing, and it is arranged in four weeks: sin and its consequences, the life of Christ, the passion, the resurrection. Its characteristic method is composition of place, in which the retreatant imagines a gospel scene in physical detail and puts himself inside it, and its characteristic instrument is the daily examen, a short structured review of the day's interior movements. Its aim is a decision, arrived at freely, and the director is warned repeatedly not to steer it.
The Society of Jesus, approved in 1540, was designed around the same priority: getting people to where they were needed. Ignatius dispensed with the choral office that anchored older orders to a building, adopted no distinctive habit, and added a fourth vow concerning missions at the pope's disposal, so that a man could be sent anywhere at short notice. Schools were not in the original plan and became the order's principal work within a generation. His phrase for the spirituality behind it is finding God in all things, which is a working instruction rather than a sentiment.
He spent his last years in Rome writing the Constitutions and administering the order, and he was investigated by the Inquisition several times over his life, once imprisoned, on suspicion of the illuminist tendencies then under scrutiny in Spain. He was acquitted each time.