The most important educational principle is not to cherish the time, to waste time.
最重要的教育原则是不要爱惜时间，要浪费时间。
The test of our progress is not whether we add more to the abundance of those who have much; it is whether we provide enough for those who have too little.
We don't inherit the earth from our ancestors; we borrow it from our children—this is especially true in forestry.
不管你有多少钱，世上只有两种人：一种是还幸存的，一种是已迷失的。
I don't think about age. I think about spirit.
Success is not final, failure is not fatal: It is the courage to continue that counts.