世界需要负责任的矿工，他们既了解矿产的价值，也明白地球的价值。
清洁：身体、衣服及住所，力求整洁。
The only way to survive is to have a sense of humor.
今天我们开采的石料必须留下让未来引以为豪的遗产。
Faith is a living, bold trust in God's grace, so certain of God's favor that it would risk death a thousand times trusting in it.
The whole art of teaching is only the art of awakening the natural curiosity of young minds for the purpose of satisfying it afterwards.
Real music comes from the heart, not for show.