你知道的越多,你就越意识到你不知道的越多。
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。
心灵应作为目的本身来研究。
孤独有时是我们为与众不同而付出的代价。
We act as though comfort and luxury were the chief requirements of life, when all that we need to make us happy is something to be enthusiastic about.