If more than half of my essay quotes classical poetry or famous quotes, will I get a higher score? Why?

No. The pursuit of citation is just right, but citing for the sake of citation is counterproductive.

Proper use has the following effects:

1. Take a famous sentence as the title and add the finishing touch.

2. Start with a famous sentence to get the first impression.

3. Use famous sentences to compare and highlight insights.

4. Based on famous sentences, it is unique and expressive.

5. Interspersed with famous sentences, it is completed in one go.

6. End with a famous sentence to strengthen the theme.