If you're not adapting, you're falling behind.
教授数学是为了激励下一代的思考者和问题解决者。
大多数人害怕变化，但如果你把它看成是某种你总是可以依赖的东西的话，那它就能成为一种安慰。世上你能依赖的东西并不是很多。
我们在林业方面成功的真正衡量标准是我们为子孙后代留下的东西，而不仅仅是我们的季度报告。
All men have the stars， but they are not the same things for different people。 For some， who are travelers， the stars are guides。 For others they are no more than little lights in the sky。 For others， who are scholars， they are problems。 For my businessman they were wealth。 But all these stars are silent。 You – you alone – will have the stars as no one else has them.