The only limit to our realization of tomorrow will be our doubts of today.
The most difficult thing in life is to know yourself.
遇到坏事不必愁,只要有方法补救;好事来临也不必欢喜,要会承受。
The most important challenge facing the world today is the need to create strong, effective, and accountable states in the developing world.
Sustainability in mining is not an option—it's a necessity for our future.