"The heart is the beginning of life, and the source of all motion."

"The circulation of the blood is a new thing, never before heard of, or at least not truly understood."

"The more accurately we search into the wonderful works of God, the more a reason we shall find to admire them."

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

"It is not simply by chance that the heart is placed in the midst of the body, as if it were the sun of the microcosm."