Harry Potter and the Chamber of Secrets
"The diary," said Riddle. "My diary. Little Ginny's been writing in it for months and months, telling me all her pitiful worries and woes – how her brothers tease her, how she had to come to school with secondhand robes and books, how" – Riddle's eyes glinted – "how she didn't think famous, good, great Harry Potter would ever like her."
All the time he spoke, Riddle's eyes never left Harry's face. There was an almost hungry look in them.
"It's very boring, having to listen to the silly little troubles of an eleven-year-old girl," he went on. "But I was patient. I wrote back. I was sympathetic. I was kind. Ginny simply loved me. No one's ever understood me like you, Tom…I'm so glad I've got this diary to confide in…It's like having a friend I can carry around in my pocket…"
Riddle laughed, a high, cold, laugh that didn't suit him. It made the hairs stand up on the back of Harry's neck.
"If I say so myself, Harry, I've always been able to charm the people I needed. So Ginny poured out her soul to me, and her soul happened to be exactly what I wanted…I grew stronger and stronger on a diet of her deepest fears, her darkest secrets." (17.41-45)