STOP AND THINK – Happiness is the real sense of fulfillment that comes from hard work. (Joseph Barbaras, Italian-American animator, director, and producer)
When you have done your work only half-heartedly, you never have a real sense of accomplishment. You know you could have done better. But when you really work hard at a task—especially a difficult one, you gain a sense of completion and satisfaction. That may be as close to happiness as you can come in your work life.