经济不平等不仅是一个道德问题，也是一个经济问题。
My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all.
Success is not sustainable if it is defined by how big you become or by growth for growth's sake. Success is very shallow if it doesn't have emotional meaning.
The only person who is educated is the one who has learned how to learn and change.
Every challenge in mining is an opportunity to innovate.
"The only thing to do with good advice is to pass it on. It is never of any use to oneself."
Your voice can change the world.