The sources

Wonder

Palacio, R.J. · Alfred A. Knopf · 2012

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The precept used in the final chapter belongs to Mr Browne, the teacher in R.J. Palacio’s Wonder. It is a small reminder that character is built through choices, not slogans.

Cited in

Palacio, R.J. Wonder. Alfred A. Knopf, 2012. (The precept quoted is from the novel's teacher, Mr. Browne.)