我们开采的每一吨矿石都承载着对未来的责任。
Quality is not an act, it is a habit.
On earth there is nothing great but man；in the man there is nothing great but mind.
I have always believed that the way to make money is to buy when everyone else is selling and to sell when everyone else is buying.
我相信伟大的教师就是伟大的艺术家，而且这样的艺术家和其他任何伟大的艺术家一样稀少。教学甚至可能是最伟大的艺术，因为它的媒介是人的思想和精神。
It's not always necessary to be better than everyone else, but to be better than you used to be.
