translation.en: But I was thinking about this, and I realized that although my new book makes me happy, and I think would make my mother happy, it's not really about happiness.
translation.zh: 不过当我想到这里时， 我发现我的新书虽然使我很开心， 我觉得也使我妈妈很开心， 但是书本身谈的并不是快乐。