Bede

We are also informed, that many sicknesses of body arise from sins, and therefore perhaps sins are first remitted, that the causes of sickness being taken away, health may be restored. For men are afflicted by fleshly troubles for five causes, in order to increase their merits, as Job and the Martyrs; or to preserve their lowliness, as Paul by the messenger of Satan; or that they may perceive and correct their sins, as Miriam, the sister of Moses, and this paralytic; or for the glory of God, as the man born blind and …

Catena Aurea by Aquinas ↗