心理学必须是一门观察的科学，而非推测。
通过经验获得的东西比通过推理获得的东西更真实、更坚实。
The essence of mathematics is not to make simple things complicated, but to make complicated things simple.
旅程本身就是奖励。
You have to be strong enough to stand alone, smart enough to know when you need help, and brave enough to ask for it.
The most important property of a program is whether it accomplishes the intention of its user.
The best ideas come from frustration with the status quo.