现代采石要求我们同时成为地质学家、生态学家和社区外交官。
Modern quarrying requires us to be geologists, ecologists, and community diplomats simultaneously.
The improvement of understanding is for two ends: first, our own increase of knowledge; secondly, to enable us to deliver that knowledge to others.
You don’t build a business, you build people, and then people build the business.
释文：不了解事情的真相就高谈阔论，便是不明智；如果知道了而不谈，就 是不忠诚。
The only limit to our realization of tomorrow is our doubts of today.
Always question your assumptions—that's where the most interesting discoveries often lie.
The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.