The 40% solution: The capacity to increase happiness is within our personal control.
世间的事情纷繁复杂难以预料,春天的忧愁让人黯然神伤独自入眠
True scientific progress is achieved not by mere accumulation of facts, but by the continuous refinement of theories and models.
交换、交易和互换的倾向普遍存在于所有人之中,而在其他动物种族中找不到。
The greatest gift you can give someone is your time.