因此，自爱是行动的必要原则。
Sustainability is not an option; it's a necessity for the future of mining.
真相很少纯粹，也绝不简单。
生活是世界上最罕见的事情。大多数人只是存在，仅此而已。
The highest purpose is to have no purpose at all. This puts one in accord with nature in her manner of operation.