The true measure of success is leaving the industry better than we found it.

The desire for recognition, the thymotic part of the soul, is the most political part of man.

Efficiency is doing things right; effectiveness is doing the right things.

你能做的最好的投资就是投资自己。

煤炭曾是工业进步的支柱，但其未来必须平衡经济需求与环境责任。