Choose one of six topics based on a book to write a research essay about. Topic

Choose one of six topics based on a book to write a research essay about. Topics include happiness, mental illusion, purpose in life, education, success in life, and career choice. You can choose whichever topic you want to do, and can choose to tie it into whichever text you want. I’ve included pdfs of the three texts, and screenshots of the instructions of the essay. Six sources are not required, I just need three. I do need six quotes however.
One of the texts: https://docs.google.com/document/d/14ZI_VsBsPAvWdeRLvGGXy74mOe-6ql13zwP04AEZYM8/edit