Success is not the key to happiness. Happiness is the key to success. If you love what you are doing, you will be successful.

Be civil to all; sociable to many; familiar with few; friend to one; enemy to none.

有时候最简单的旋律最有力量。

煤炭的未来不在于产量，而在于通过技术和可持续性创造价值。