William Harvey — "We are taught by nature to begin with the simple and proceed to the complex."

"I am not so mad, nor have I been so caught up in the opinion of others, as to believe that I have discovered anything so great as to be worthy of the name of a new opinion."

"The greatest happiness is to be able to understand the works of God."

"I appeal to the evidence of my senses, and to the testimony of dissections."

"The physician must be a lover of wisdom."

"Very many maintain that all we know is still infinitely less than all that still remains unknown; nor do philosophers pin their faith to others' precepts in such wise that they lose their liberty, and…"