The fountain of content must spring up in the mind, and they who have so little knowledge of human nature as to seek happiness by changing anything but their own dispositions will waste their lives in fruitless efforts.

循环经济原则可以将林业部门的废物转化为价值。

成功的秘诀是学会如何利用痛苦和快乐，而不是让痛苦和快乐利用你。如果你这样做，你就控制了你的生活。如果你不这样做，生活就控制了你。

在建筑中，集体比个人更重要。