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¡¡¡¡A painter hangs his or her finished picture on a wall, and everyone can see
¡¡¡¡it. A composer writes a work, but no one can hear it until it is performed.
¡¡¡¡Professional singers and players have great responsibilities, for the
¡¡¡¡composer is utterly dependent on them. A student of music needs as long and
¡¡¡¡as arduous a training to become a performer as a medical student needs to
¡¡¡¡become a doctor.