"I have often wondered that the heart, though it be the chief seat of life, yet is not sensible of its own motion."

"The art of medicine is to prolong life, not to shorten it."

"It is by experiment alone that we can arrive at the knowledge of nature."

"The physician must be a philosopher, for there is not so great a difference between them."

"The blood in the animal body is impelled in a circle, and is in a state of ceaseless motion."