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Isocrates was an influential teacher, perhaps the most so in the ancient history of rhetoric. His students included many notable citizen statesmen and decorated leaders. Isocrates' school had entrance requirements (few others did in those days--other than the requisite tuition).
Hippocrates was a Greek philosopher and physician who lived from 460 to 377 BC. He is known as the father of modern medicine. His work included the Hippocratic Oath which described the basic ethics of medical practice and laid down a moral code of conduct for doctors. The classical Hippocratic Oath has been translated and interpreted.