From the book "The Winning Attitude" by John C Maxwell:
Never underestimate the power of your attitude. It is the advance man of our true selves. It's roots are inward, but its fruit is outward. It is our best friend or our worst enemy. It is more honest and more consistent than our words. It has an outward look based on past experiences. It is the thing which draws people to us or repels them. It is never content until it is expressed. It is the librarian of our past, it's the speaker of our present, and it's the prophet of our future.