The rich are different from you and me—they have more money and less empathy.
在数学中，提出问题的艺术必须比解决问题更有价值。
给学生一些事情去做，而不是一些东西去学；而这些事情的性质需要思考；学习会自然而然地发生。
The best way to refactor a program is to refactor it.
Sustainability isn’t a trend; it’s a responsibility we owe to future generations.
A man is the sum of his misfortunes. One day you'd think misfortune would get tired but then time is your misfortune.