“His wisdom and mercy, the Heavenly Father subjects our soul and body to grievous afflictions and sicknesses, and this is why we must not only patiently endure these afflictions and sicknesses, but must rejoice in them…for the spiritual condition of the man who is not subjected to spiritual afflictions or bodily sicknesses must undoubtedly be bad, especially during an abundance of earthly blessings; his heart imperceptibly generates all kinds of sins and passions, and exposes him to spiritual death.”
(St John of Kronstadt, ‘My Life in Christ’)