The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

For the past 33 years， I have looked in the mirror every morning and asked myself: 'If today were the last day of my life， would I want to do what I am about to do today？' And whenever the answer has been 'No' for too many days in a row， I know I need to change something.

I don't think about being a role model. I just try to be the best person I can be.

The only way to do great work is to love what you do.

Success is not about the destination, it's about the journey.

The key to successful investing is to minimize costs and taxes.

Coal is not just a commodity, it's a commitment to America's future.