If, desirous of bringing them to self-knowledge and of leading them to the right path of perfection, God sends them afflictions and sickness, or allows them to be persecuted, by which means He habitually tests His true and real servants, this test immediately shows what is hidden in their hearts, and how deeply they are corrupted by pride. For whatever affliction may visit them, they refuse to bend their necks to the yoke of God’s will and to trust in His righteous and secret judgments. They do not want to follow the example of our Lord Jesus Christ, Son of God, Who humbled Himself and suffered for our sakes, and they refuse to be humble, to consider themselves the lowest of all creatures, and to regard their persecutors as their good friends, the tools of the divine bounty shown to them and helpers in their salvation.

—Lorenzo Scupoli, Unseen Warfare