The sovereign source of melancholy is repletion. Need and struggle are what excite and inspire us; our hour of triumph is what brings the void. Not the Jews of the captivity , but those of the days of Solomon's glory are those from whom the pessimistic utterances in our Bible come.
郁郁寡欢最主要的起因是过分饱足。需求与挣扎才使我们振奋；功成名就带来的是空虚无为。圣经中最悲观消极的篇章并非写于犹太人成为囚徒之后，而是在所罗门最为富贵荣耀之时。

——William James, The Will to Believe
——威廉·詹姆斯