William Harvey:

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

— William Harvey Early Modern

Blood circulation

De Motu Cordis (Exercitatio Anatomica de Motu Cordis et Sanguinis in Animalibus), Dedication to King Charles I

1628

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Confirmed

Found in 2 providers: gemini,grok

Cross Reference

2 sources

"The motion of the blood is in a circle, and is in truth perpetual."

"The physician's art is to imitate nature."

"The heart is the household divinity which, discharging its function, nourishes, cherishes, quickens the whole body."

"The body is a machine, but it is a divine machine."

"Nature is the best teacher."