We can’t ignore the economic role of coal, but we also can’t ignore its environmental impact.

The most dangerous poison is the feeling of achievement. The antidote is to think every evening what can be done better tomorrow.

The past is never dead. It's not even past.

Three things are necessary for the salvation of man: to know what he ought to believe； to know what he ought to desire； and to know what he ought to do.

在任何行业取得成功的关键是比任何人都更了解市场。