William Harvey

"The heart of animals is the foundation of their life, the sovereign of everything within them, the sun of their microcosm, that upon which all growth depends, from which all power proceeds."

"I profess both to learn and to teach anatomy, not from books but from dissections; not from positions of philosophers but from the fabric of nature."

"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…"

"The studious and good and true, never suffer their minds to be warped by the passions of hatred and envy, which unfit men duly to weigh the arguments that are advanced in behalf of truth, or to apprec…"

"I avow myself the partisan of truth alone."

"As art is a habit with reference to things to be done, so is science a habit in respect to things to be known."

"I appeal to your own eyes as my witness and judge."

"Man comes into the world naked and unarmed, as if nature had destined him for a social creature, and ordained him to live under equitable laws and in peace; as if she had desired that he should be gui…"