我听说楚地有一只神龟，已死三千年了，楚王用布包好，再用竹编把它装着，藏在庙堂之上。这龟，宁愿死了尊贵地保留着骸骨呢，还是宁愿活着在泥水中摇曳着尾巴？

There is no doubt that in exchanging a self-centered for a selfless life we gain enormously in self-esteem. The vanity of the selfless, even those who practice utmost humility, is boundless.

（均平的状态下，水）保有内蕴，而外部毫无所动。

Sustainability isn't an option anymore—it's a necessity for any business that wants to thrive in the 21st century.

解析：用功在于为善之心真切。