Who said "I asked him one thing: was the scar all that mattered"?

This quote is attributed to Amir.

I asked him one thing: was the scar all that mattered - Amir

"I asked him one thing: was the scar all that mattered"

Amir

Character in The Kite Runner

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"I became what I am today at the age of twelve, on a frigid December day in 1975."

"When you kill for the first time, you lose your innocence."

"Theft and lying were part of their world."

"I could wade into this river, let my sins drown to the bottom."