"What is it?" asked the man in the chair hoarsely, lifting his head.

"That, my dear Monsignor," explained the doctor carefully, "is a
reflection of your physical condition. It is an exceedingly
simple, though of course very delicate instrument. The method
was discovered---"

"Is it anything to do with magnetism?"

"They used to call it that, I think. It's got several names now.
All mental disturbance has, of course, a physical side to it, and
that is how we are able to record it physically. It was
discovered by a monk, of course."

"But . . . but it's marvellous."

"Everything is marvellous, Monsignor. Certainly this, however,
caused a revolution. It became the symbol of the whole modern
method of medicine."

"What's that?" The doctor laughed.

"That's a large question," he said.

"But . . ."

"Well, in a word, it's the old system turned upside down. A
century ago when a man was ill they began by doctoring his body.
Now, when a man's ill, they begin by doctoring his mind. You see
the mind is much more the man than the body is, as Theology