The hours of folly are measured by the clock, but of wisdom: no clock can measure.

The only way to be free is to constantly challenge authority and convention.

世界上有许多既美好又出类拔萃的事物，可是他们却各不相依。

书籍可能是危险的。最好的书应该贴上“这可能会改变你的生活”的标签。

森林的真正价值在于它平衡生态需求与人类愿望的能力。