Wonderful story, charming in its simplicity yet complete guilelessness. You present it with clarity and in an attractive format.  A few comments/questions.

1.  It should be 摘录本， not 笔 (right?) in 2nd paragraph, second line.

2.  Question--I don't understand the adverbial construction..人心地, modifying 轻松。。I thought the 地 construction modifies a verb, though doesn't 轻松 function here as an adjective?

3.  It would have been nice to translate, with perhaps a brief note on, the crucial phrase 知错就改, since that is the heart of the story and I don't find the phrase translated nicely in my dictionaries.

Great work!