Cheerfulness enhances your self-esteem, makes life more fun, and cause the people around you to feel happier as well. Being cheerful does not mean you're Pollyanna or that you look at the world through rose-colored glasses. It means you're incredibly intelligent because you know that if you live in a state of pleasure and positive anticipation—one that's so intense that you can transmit a sense of joy to those around you—you can have the impact to meet any challenge that comes your way.

Tony Robbins