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The true value of a forest cannot be measured in board feet alone.

It is a curious subject of observation and inquiry, whether hatred and love be not the same thing at bottom.

The capitalist achievement does not typically consist in providing more silk stockings for queens but in bringing them within the reach of factory girls in return for steadily decreasing amounts of effort.

Sustainability isn’t an option; it’s the only way forward.

譯文：年輕的時候讀書并沒有取得深刻的理解，到了晚年的時候并沒有付出多大努力卻取得了驚人的成就。賞析：不管讀書還是做事，我們要盡量做好，即使當時不理解，遲早有一天會明白其中的道理。年輕時不理解，是因為我們的社會閱歷和人生經驗不夠豐富。