"Elle ne croyait en rien ; seul son scepticisme l'empêchait d'être athée."

Simplified Meaning:

This quote is about a person who doesn't believe in anything, not even in disbelieving. It means she questions everything and finds it hard to fully believe in any idea or religion. She doesn't accept traditional religious beliefs, but she also doesn't entirely reject the possibility that something might be out there. Instead of being an atheist, who firmly believes there is no God, she remains uncertain and always skeptical. Imagine someone who is very cautious about trusting doctors. This person might not believe entirely in modern medicine but also doesn't dismiss it completely. They might always seek second opinions, question treatments, and research alternative cures. This behavior keeps them from fully siding with or against modern medicine. In life, being skeptical like this can help someone remain open-minded and avoid being misled by false information. However, it can also make it difficult to commit to any particular belief or path.