最难的是理解已经知道的东西。

The only person you should try to be better than is the person you were yesterday.

I never looked at the consequences of missing a big shot... when you think about the consequences you always think of a negative result.

【释义】：孤高自傲的人，难以共处，懂得留有余地的人，不会匮乏，穷尽一切的人，就会面临衰竭。

林业的未来在于平衡经济需求与生态责任。