Friendship is a single soul dwelling in two bodies.
应对不自由世界的唯一方法是变得如此绝对自由，以至于你的存在本身就是一种反叛。
True sustainability means leaving the land better than we found it for future generations.
Insight is the sudden comprehension of the relations among the parts of a problem.
The world owes all its onward impulses to men ill at ease. The happy man inevitably confines himself within ancient limits.
Forests are not just carbon sinks—they are life sources.