A miner's skill and dedication are just as valuable as the coal they bring to the surface.

历史给我们的教训是，人们从来都不知道汲取历史的教训。

If you want to be successful, you have to think long-term. Short-term gains often lead to long-term losses.

实现明天理想的唯一障碍是今天的疑虑。