一个观念的效用决定了它在精神生活中的地位。

Profitability and purpose are not mutually exclusive.

Innovation in mining technology is essential to meet the world's energy demands.

The only real mistake is the one from which we learn nothing.

穷人不是不想储蓄，而是没有能力储蓄。

所有的事情——除了爱——都应该从退出策略开始。要对结束做好准备。几乎所有事情都是进入容易抽身难。