C. S. Lewis, “The Voyage of the Dawn Treader,” in The Chronicles of Narnia (repr., San Fransisco: HarperCollins, 2004), 476:

[Context: The narrator makes this observation shortly after Aslan transforms Eustace Scrubb, the selfish-brat-turned-dragon, back to his human form.]

It would be nice, and fairly true, to say that “from that time forth Eustace was a different boy.” To be strictly accurate, he began to be a different boy. He had relapses. There were still many days when he could be very tiresome. But most of those I shall not notice. The cure had begun.