The question I ask myself like almost every day is, 'Am I doing the most important thing I could be doing?'

采矿行业的领导力意味着对利润和地球负责。

The greatest happiness is to know the source of unhappiness.

Innovation distinguishes between a leader and a follower.

选择最好的生活，因为习惯会使它愉快。

最大的风险是不冒任何风险。

I became insane， with long intervals of horrible sanity.