In reading the third part of the article, I found there is a sentence that it took me some time to understand and it brought me some ideas.
In paragraph twelve, there is a sentence “depending on our outlooks and recent experience, our happiness fluctuates around our happiness set point, which dispose some people to be ever cheerful and others gloomy”. In this sentence, “fluctuates” is a new word, so I consulted the dictionary. It means “to change or vary continuously and between one level or thing and another”. “Our happiness set point” refers to “our inherited happiness level” and the expression “dispose someone to do something” means “make someone ready or willing to do something.
In my opinion, the use(改為usage) of this sentence is to tell us that whether a person is happy or not is mainly depended on his own happiness set point, which is inherited from their parents. May be there are other factors that affect someone’s happiness, but they are all not important.
