衡量森林价值的真正标准不是木材的板英尺数,而是几个世纪的生态平衡。
成就的唯一途径是热爱自己的事业,如果你还没找到的话,继续寻找,不要屈就。
The duty of man is the same in respect to his own nature as in respect to the nature of all other things.