The work is always changing.

Whenever you find yourself on the side of the majority, it is time to pause and reflect.

The study of mathematics is the indispensable basis for all intellectual and spiritual progress.

The best way to survive in any situation is to be prepared for it.

Life has to be given a meaning because of the obvious fact that it has none.

可持续性不是一个流行词，而是矿业前进的唯一道路。