"The most dangerous prisons are those we build in our minds."
最危险的监狱是我们建在脑海中的那些。
今天投资于负责任林业的每一美元，明天都会成长为一百美元的环境和经济价值。
The best way to learn is by doing, not just by listening or reading.
解析：学习圣人之道应遵从孔孟教诲。