"See, the art of healing mainly focuses on choice and balance."

All I recieved was a gurgle in reply.

"Yeah we use aspects of growth magic and a whole lot of divination, but it's all about keeping things as close to optimum as possible. The ancients called it 'Homeostasis'."

No gurgles this time. Just a silent plea from eyes filled with horror.

"And, when it comes down to it, there's always an implicit assumption that the thing we help heal, to grow, is the patient, the human body. Which requires a lot of training so that we don't accidentally heal or grow the organisms that feed on human flesh."

Silence finally as the ex-bandit finishes rotting alive.

"Ever hear of bacteria?"