History taught us is that people never know learn the lessons of history.

The beauty of mathematics lies in its ability to describe the universe in the simplest terms.

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。

我一直相信，只要你付出努力，结果自然会来。

He who sacrifices freedom for security deserves neither.

当今世界上最普遍的不平等形式不是贫富之间的不平等，而是男女之间的不平等。