Explain why reference points that are stationary are usually chosen to determine weather in motion

In twelve years a slave, northup realizes he cannot trust anyone after his kidnapping except hamilton and brown god the physician the women who gave him drink

Ineed simplifying this thesis and making it easier to understand for the reader (more concise) "no matter how religious one may be, one’s faith tends to change under unexpected and challenging circumstances."

Based on her speech in the excerpt ,what can we infer about francesca