You know, medicine is not an exact science, but we are learning
all the time. Why, just fifty years ago they thought a disease
like your daughter's was caused by demonic possession or witchcraft.
But nowadays, we know that Isabelle is suffereing from an imbalance
of bodily humors, perhaps caused by a toad or a small dwarf living
in her stomach. 

     - Theodoric of York, Saturday Night Live