We can now step back and use Gallagher's grand theory to better understand the role of deep work in cultivating a good life. This theory tells us that your world is the outcome of what you pay attention to, so consider for a moment the type of mental world constructed when you dedicate significant time to deep endeavors. There's a gravity and sense of importance inherent in deep work--whether you're Ric Furrer smithing a sword or a computer programmer optimizing an algorithm. Gallagher's theory, therefore, predicts that if you spend enough time in this state, your mind will understand your world as rich in meaning and importance.