In teaching you cannot see the fruit of a day's work. It is invisible and remains so, maybe for twenty years.
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About Jacques Barzun
Jacques Barzun was a 20th-century American american historian. Jacques Martin Barzun was a French-born American historian known for his studies of the history of ideas and cultural history. He wrote about a wide range of subjects, including baseball, mystery novels, and classical music, and was also known as a philosopher of education. Read more on Wikipedia →