经济模型的价值在于其解释和预测的能力。
The value of an economic model lies in its ability to explain and predict.
Every decision we make in forestry today will echo for generations to come.
No man really knows about other human beings. The best he can do is to suppose that they are like himself.
生命、自由和共同礼仪的最坏敌人是完全的无政府状态；它们的第二坏敌人是完全的权力。
故事是理解世界的方式。