Al-Zahrawi claims that his knowledge comes from careful reading of previous medical texts as well as his own experience: “...whatever skill I have, I have derived for myself by my long reading of the books of the Ancients and my thirst to understand them until I extracted the knowledge of it from them. Then through the whole of my life I have adhered to experience and practice... I have made it accessible for you and rescued it from the abyss of prolixity".