Knowledge
Knowledge is a familiarity, awareness, or understanding of someone or something, such as facts, information, descriptions, or skills, which is acquired through experience or education by perceiving, discovering, or learning.
Medicine
Medicine is the science and practice of the diagnosis, treatment, and prevention of disease. Medicine encompasses a variety of health care practices evolved to maintain and restore health by the prevention and treatment of illness. Contemporary medicine applies biomedical sciences, biomedical research, genetics, and medical technology to diagnose, treat, and prevent injury and disease, typically through pharmaceuticals or surgery, but also through therapies as diverse as psychotherapy, external splints and traction, medical devices, biologics, and ionizing radiation, amongst others.
Knowledge
All teaching and all intellectual learning come about from already existing knowledge.
Aristotle, Posterior Analytics (71a 1), tr. by Jonathan Barnes (1984/95)
Other translations of this quote:
All doctrine, and all intellectual discipline, arise from pre-existent knowledge, O.F. Owen (1853)
All communications of knowledge from teacher to pupil by way of reasoning pre-suppose some pre-existing knowledge., E.S. Bouchier (1901)
All instruction given or received by way of argument proceeds from pre-existent knowledge, G.R.G. Mure (1928).
Other translations of this quote:
Medicine
He (Tiberius) was wont to mock at the arts of physicians, and at those who, after thirty years of age, needed counsel as to what was good or bad for their bodies.
Tacitus, Annals, Book VI, Chapter XLVI. Same told by Suetonius, Life of Tiberius, Chapter LXVIII.