William J. Mayo quotes:

The aim of medicine is to prevent disease and prolong life, the ideal of medicine is to eliminate the need of a physician.

Given one well-trained physician of the highest type he will do better work for a thousand people than ten specialists.

A specialist is a man who knows more and more about less and less.

Lord, deliver me from the man who never makes a mistake, and also from the man who makes the same mistake twice.