I just stepped out to get the mail. A neighborhood boy of about 13 is throwing a tennis ball at a garage-door target, scooping it up each time it bounces on the driveway. He's chanting, "I am amazing, I am amazing, I am amazing." Not in an arrogant way. He's just lost in the game and his thoughts. It is priceless.
Now, how to bottle that for a character?
P.S. I had my own positive chant as a kid. You?