If you want to be the person you ought to be, you've got to welcome competition.

The health of our home planet and the survival of our species will only be secured through the use of space resources and the expansion of Earth's economic sphere to the Moon and beyond. Creating an off-Earth economy and multi-planet civilization will safeguard the long term prospects of humanity.

One of the great lessons I've learned in athletics is that you've got to discipline your life. No matter how good you may be, you've got to be willing to cut out of your life those things that keep you from going to the top.

Goals give purpose. Purpose gives faith. Faith gives courage. Courage gives enthusiasm. Enthusiasm gives energy. Energy gives life. Life lifts you over the bar.

You are what you think. You are what you go for. You are what you do! You are what you think you are.