disease: a bodily illness that has settled on a person and calls for healing
This is the ordinary Greek word for a disease, and in the New Testament it keeps to one setting. All twelve times it appears, sick people are being brought to Jesus, or Jesus and those he sends out are healing them. Greek writers outside the Bible could stretch the word much further, using it for a troubled mind, a raging obsession, or the rot in a city's public life. The New Testament writers never do. Here it stays a name for what is physically wrong with a body.
The word points at the affliction itself rather than at the weakness it leaves behind, and it is the heavier of the two words the Gospels use for bodily trouble. Matthew sets it beside a gentler word for an ailment or complaint (μαλακία) in each of his three summaries of Jesus' work, so that the pair means something like "every disease and every ailment": the serious settled conditions and the milder ones together, with nothing left out.
The Gospel writers also keep disease and demonic affliction deliberately apart, listing them side by side rather than folding one into the other:
- Luke says the crowd came to be healed of their diseases, and then says separately that those troubled by unclean spirits were cured.
- When Jesus sends out the Twelve, Luke reports that he gave them authority over demons and, as a second thing, power to cure diseases.
- In Acts, cloths carried away from Paul are said to make diseases leave people, and then to make evil spirits come out of them.
So the word itself marks off plain physical sickness. Whatever else the New Testament says about the causes of human suffering, this word names the condition of the body, not the state of the soul.