记忆是最残酷的暴君，也是最仁慈的救主。
幸福和不幸取决于我们对事物的看法。
The surest way to corrupt a youth is to instruct him to hold in higher esteem those who think alike than those who think differently.
Have the courage to follow your heart and intuition.
Efficiency in mining comes from continuous improvement, not just big breakthroughs.
Success is not final, failure is not fatal: It is the courage to continue that counts.
The past is never dead. It's not even past.