Innovation is not an option; it's a necessity for the survival of the coal industry.
You have to believe in yourself, even when no one else does.
除非一个人爱过动物,否则他灵魂的一部分仍未觉醒。
You can only find out what you actually believe (rather than what you think you believe) by watching how you act. You simply don’t know what you believe, before that. You are too complex to understand yourself.
All wealth is the product of labor.