Insights:

1. The Conflict Between Personal Emotions and Social Norms:
   The story of Julie and Saint-Preux highlights the intense conflict between personal emotions and societal expectations. Julie is forced to abandon her love for Saint-Preux to comply with family and societal norms. This reminds modern people of the need for courage and wisdom to find a balance between personal values and societal expectations. While modern society is more open, the conflict between the individual and society remains a significant challenge.

2. The Influence of Nature and Education:
   Rousseau emphasizes the importance of natural education in "Julie, or The New Heloise," advocating for an educational approach that respects individual nature and emotional development. Julie's education equips her with independent thinking but also leads to confusion in the face of societal norms. This inspires modern people to recognize that education is not merely about knowledge transfer but also about fostering individuality and emotional guidance. Modern society should prioritize personalized education, respecting each individual's uniqueness and helping them become their true selves.

3. Gender Roles and Equality:
   Julie's character reflects the struggles and resistance against traditional gender roles. Despite being constrained by societal expectations, she maintains her independent thoughts and emotions. This reminds modern people that gender roles should not be a barrier to personal development. Modern society should strive for gender equality, encouraging women to pursue their ideals and careers while respecting men's diversity and emotional expression. Breaking free from gender role stereotypes is essential for achieving true social progress.

4. The Importance of Communication and Understanding:
   The epistolary form of the novel highlights the importance of communication and understanding in human relationships. Julie and Saint-Preux maintain a deep emotional connection through their letters, even during separation. This inspires modern people to recognize that communication and understanding are vital bonds in maintaining relationships. In the digital age, sincere is needed to establish deeper emotional connections and avoid misunderstandings and alienation caused by poor communication.

5. Self-Awareness and Growth:
   Through her letters, Julie constantly reflects on her emotions and actions, showcasing the process of self-awareness and growth. This inspires modern people to recognize that only through continuous reflection and self-exploration can they truly understand themselves and achieve personal growth. In today's fast-paced and high-pressure society, people need to take time to introspect and explore their inner world to find their own life direction.

6. Social Class and Inequality:
   The novel reveals the profound impact of social class on individual destiny. Julie and Saint-Preux's love is hindered by social class differences, reflecting the constraints of social inequality on personal life. This inspires modern people to recognize that while society is progressing, issues of class and inequality still exist. We need to work together to promote social fairness and justice, creating equal opportunities and environments for everyone.

7. Moral and Ethical Dilemmas:
   Julie faces moral and ethical dilemmas as she struggles with family and societal pressures. She must choose between personal emotions and societal obligations, showcasing the complexity of moral decision-making. This inspires modern people to recognize that moral and ethical issues often have no simple answers and require deep thinking and consideration before making choices that align with their values. In modern society, facing complex moral dilemmas requires clear judgment and firm beliefs.

8. The Relationship Between Love and Responsibility:
   The novel explores the complex relationship between love and responsibility. Julie's responsibility to her family conflicts with her love for Saint-Preux, reminding modern people that love and responsibility are not mutually exclusive but can be harmoniously integrated. In modern society, we need to find a balance between love and responsibility, experiencing warmth in responsibility and fulfilling responsibility in love. Only by finding this balance can we achieve true happiness and harmony.

9. The Balance Between Freedom and Constraint:
   Rousseau's philosophy emphasizes the importance of nature and freedom but also acknowledges that freedom is not unlimited indulgence but achieved within constraints. Julie's story highlights the contradictions and balance between freedom and constraint. This inspires modern people to recognize that freedom is not absolute but needs to be balanced with respect for societal norms and personal choices. Only by achieving freedom within constraints can one truly attain inner satisfaction and social harmony.

10. The Connection Between Art and Society:
    "Julie, or The New Heloise" reflects social reality through its artistic form, showcasing the close connection between art and society. This inspires modern people to recognize that art is not only an aesthetic carrier but also a reflection and critique of societal issues. In modern society, we need to use artistic works to focus on social problems and promote social progress and transformation. The power of art lies in its ability to provoke thought and resonance, promoting social harmony and advancement.