It's rather hard to decide just when people are grown up,' laughed Anne.
'That's a true word, dearie. Some are grown up when they're born, and others ain't grown up when they're eighty, believe me. That same Mrs. Roderick I was speaking of never grew up. She was as foolish when she was hundred as when she was ten.'
'Perhaps that was why she lived so long,' suggested Anne.

Author: L.M. Montgomery