The greatest investment risk is not the volatility of prices, but whether you will suffer a permanent loss of capital.

The war on coal is a war on the American worker.

The earth gives us coal; our duty is to give back stewardship.

我打网球不是为了金钱或名声，而是因为我热爱它。

所以富贵的人极其奢侈，二孤儿寡妇却受饥挨饿，虽然想天下不乱，也不可能。国君若真的希望天下太平而不希望天下大乱的话，如果要吃喝，就不能不节俭。