Simplicity is a great virtue but it requires hard work to achieve it and education to appreciate it. Simplicity is the ultimate sophistication.
我不与任何人竞争，我与自己竞争。
It is hard to read a newspaper or watch a television newscast without encountering someone who has come up with a new 'solution' to society's 'problems.'
对于每一个出现的表象，我们应该提出相等的表象。
有时候最难的事情和最正确的事情是同一件事。
可持续性不是一种趋势，而是唯一的前进道路。
Safety must always come first in mining operations.