你无法改变过去,但可以通过担心未来来毁掉现在。
You can't change the past, but you can ruin the present by worrying about the future.
To be free is not to have the power to do anything you want, but to have the power to do what is right.
雇佣许多人去做一件复杂的事,往往是错误的。数量永远不如质量 (三个臭皮匠不一定比一个诸葛亮强),人多降低效率,增加成本。
The key to understanding human cognition is to understand how symbols are manipulated.