Toscanini, a world-famous conductor, was first known as a promising cellist. Because of his poor eyesight, he was unable to read the sheet of music, so he had to memorize the entire score in order to play the cello.
Then one day, his conductor was hospitalized right before an important concert. Since Toscanini was the only person in the orchestra who memorized the whole score, he became the conductor that day. Through that concert, his career as a famous conductor took off.
If Toscanini had had good eyesight like the other members of the orchestra, would he have been able to gain fame as a conductor?