1. Demonstration method: In the sixth paragraph of Dedication and Happiness, the author cited the examples of "being a big president" and "pulling rickshaws", and demonstrated the view that "all occupations are interesting, and as long as you are willing to continue doing it, your interest will naturally arise" from both positive and negative aspects.

2. Function: Facts speak louder than words. Taking familiar things as examples, the author strongly demonstrates the view that "all occupations are interesting, and as long as you are willing to continue, interest will naturally arise", which strengthens the persuasiveness.