"Before you heal someone, ask him if he's willing to give up the things that make him sick."

"If a man has a pain in his knee, and it is on the outer side, it is a sign that he will have a fever."

"It is more important to know what sort of person has a disease than to know what sort of disease a person has."

"The greatest joy in life is to be healthy."

"The powers of drugs are not to be trusted, but the power of nature is to be trusted."