It wasn't just the beauty of the polished stone block walls or the fact that this abandoned city sits atop a narrow ridge more than 2400 meters above sea level.

VOA: standard.2009.12.15

All I needed to do was to chip away the excess stone, to get rid of the marble that shouldn't have been there.

我只要凿去多余的石头，只留下有用的。

哈佛公开课 - 幸福课课程节选