What sense would it make or what would it benfit a physician if he discovered the origin of the diseases but could not cure or alleviate them?

The book of Nature is that which the physician must read; and to do so he must walk over the leaves.

Fasting is the greatest remedy-- the physician within.

Every physician must be rich in knowledge, and not only of that which is written in books; his patients should be his book, they will never mislead him.