Now happiness and unhappiness,or happiness and neurosis, psychosis and depression,are interconnected,of course.

幸福与忧愁，快乐与紧张，精神病与抑郁，都有很大的内在联系。

哈佛公开课 - 幸福课课程节选

One of the sentences that I'll repeat throughout the class is that happiness is much more contingent on our state of mind than our status or the state of our bank account.

有一句话我会在课程中经常引用,快乐由我们的精神状态而定，而不是社会地位或银行存款。

哈佛公开课 - 幸福课课程节选