The art of leadership is saying no, not saying yes. It is very easy to say yes.
领导的艺术在于说不，而不是说是。说是很容易的。
Any change, even a change for the better, is always accompanied by drawbacks and discomforts.
The truth is rarely pure and never simple.
如果一个人不过高地估计自己，他就会比他自己所估计的要高得多。
最好的数学是简单的，但又不至于过于简单。
The most important property of a program is whether it accomplishes the intention of its user.
聪明的投资者是现实主义者，他们向乐观主义者出售，从悲观主义者那里购买。