The Prophetic saying “If anyone carries out medical treatment, yet previously he was not known as a medical man, then he takes the responsibility”, as well as the theologians’ opinion that medical knowledge was not only among the praiseworthy sciences, but also a community obligation, as it is necessary for the life of the body, were factors which acted as an inspiration to learning medicine and to endeavouring to excel in its practice. So, both the abundance of the translated ancient medical books, which became available to people, and the saying of the eminent physician Abū Bakr Muḥammad ibn Zakariyyā al-Rāzī (Rhazes, 865–925) that: “He who studies the work of the Ancients gains the experience of their labour, it is as if he himself had lived a thousand years spent on investigation”, gave a great boost for more people to study and practice medicine.