"The heart of animals is the foundation of their life, the sovereign of everything within them, the sun of their micro…"

"Very many maintain that all we know is still infinitely less than all that still remains unknown; nor do philosophers…"

"The studious and good and true, never suffer their minds to be warped by the passions of hatred and envy, which unfit…"

"I profess both to learn and to teach anatomy, not from books but from dissections; not from positions of philosophers…"

"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 …"

"Few would have predicted that the discovery of the circulation of the blood would have changed the way philosophers v…"

"Harvey was not content merely to gather knowledge; he digested and arranged it under the guidance of the faculties wh…"