Hippocrates of Cos (c. 460 BC - 377 BC), an ancient Greek physician that some have called the "father of medicine."

Attributed

• "There are, in fact, two things: science and opinion; the former begets knowledge, the latter ignorance."
• "He who does not understand astrology is not a doctor but a fool."
• "Art is long, life is short."
• "People believe that this disease is sacred simply because they don't know what causes it? But some day I believe they will, and the moment they figure out why people have epilepsy, it will cease to be considered divine."
• "Walking is man's best medicine."
• "Idleness and lack of occupation tend - nay are dragged - towards evil."
• "For a theory is a composite memory of things apprehended with sense perception."
• "But conclusions which are merely verbal cannot bear fruit."
• "I approve of theorizing if it lays its foundation in incident, and deduces its conclusions in accordance with phenomena."