Man is the measure of all things: of things which are, that they are, and of things which are not, that they are not.

Sustainability isn't an option anymore—it's a necessity for any responsible mining operation.

大海不拒绝各种各样的水，所以才能成就它的博大；大山不拒绝形形色色的土石，所以才能成就它的高峻；贤明的君主不嫌弃百姓，所以能够聚集众多的臣民；读书人不厌倦学习，所以能达到圣贤的境界。

集中注意力的能力对于学习、记忆和复杂任务的表现至关重要。