"I have often wondered and even laughed at those who fancied that everything had been so consummately and absolutely investigated by an Aristotle or a Galen or some other mighty name, that nothing coul…"

"The pulse is nothing more than the impulsion of the blood into the arteries."

"The heart does not draw the blood, but propels it."

"It is a thing alike wonderful and incredible, to observe how the blood, from the very beginning of its motion, is distributed from the heart through the whole body, and then returns to the heart again…"

"It is not the strongest of the species that survives, nor the most intelligent, but the one most responsive to change."