Happiness is not the belief that we don't need to change; it is the realization that we can.

Our most commonly held formula for success is broken. Conventional wisdom holds that once we succeed, we'll be happy; that once we get that great job, win that next promotion, lose those five pounds, happiness will follow. But the science reveals this formula to be backward: Happiness fuels success, not the other way around.

Research shows that happy employees are more productive, more creative, and better problem solvers than their unhappy peers. And positive people are significantly healthier and less stressed and enjoy deeper social interaction than the less positive people around them.