Answer: Steadfast contentment.
Explanation: The Diary of Anne Frank provides her emotions, her authentic emotions, through her writing. Cultural experiences when celebrating holidays or when acting a certain way are provided as well. Her personal perspective is clear, as it is in a first person point-of-view. However, she is never content. Her ethnicity was being murdered, providing no contentment.
The definition of down to earth is someone or something that is free of pretension and doesn't put on airs, but who is instead simple and straight-forward. An example of down to earth is a person who buys a nice cozy farmhouse instead of a giant mansion.