Coal miners don't just dig in the dirt, they dig for progress.

有时候问题很复杂，但答案却很简单。

Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.

The people who live in a golden age usually go around complaining how yellow everything looks.

质量绝非偶然，它总是智慧努力的结果。