我们不是从祖先那里继承地球；我们是从子孙那里借来的——这在林业中尤其如此。
We don't inherit the earth from our ancestors; we borrow it from our children—this is especially true in forestry.
在解释行为时，意志的概念是不必要的。
没有什么比心里藏着一个未讲的故事更痛苦的了。
The elements of consciousness are to be determined by systematic observation.
Life is about making an impact, not making an income.