Until recently, it seemed sensible to assume that our happiness was determined by factors such as luck, fate, or genes that are beyond our control. It was easy to believe that, in the words of Samuel Beckett, the “tears of the world are a constant quantity.”
伦敦——过去几年里，幸福的理念已经发生了翻天覆地的变化。直到不久前，由运气、命数或我们无法控制的基因等因素决定我们幸福与否还貌似是合理的假设。用塞缪尔·贝克特的话说，人们愿意相信“全世界的泪水是个恒定的常数。”