That is the difference between good teachers and great teachers: good teachers make the best of a pupil's means great teachers foresee a pupil's ends.
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About Maria Callas
Maria Callas was a 20th-century American born greek soprano. Maria Callas was an American-born Greek soprano and one of the most renowned and influential opera singers of the 20th century. Many critics praised her bel canto technique, wide-ranging voice and dramatic interpretations. Read more on Wikipedia →