Yes, teacher! Those were the two words I spoke more than any others when I was in mission school. They were like magic." What does Ned mean when he says that the words "Yes, teacher" are "like magic"?

Explanation:

By using a figurative language called Metaphor, Ned was likely comparing the words,  "Yes, teacher"  to the remarkable effectiveness of using those words to have a good relationship with his teachers while in Mission school.

Hence, Ned was likening how effective or convincing magic actually is with the words "Yes, teacher".

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