Focusing on the overall system, rather than a single goal, is one ofthe core themes of this book. It is also one of the deeper meaningsbehind the word atomic. By now, youve probably realized that anatomic habit refers to a tiny change, a marginal gain, a percentimprovement. But atomic habits are not just any old habits, howeversmall. They are little habits that are part of a larger system. Just asatoms are the building blocks of molecules, atomic habits are thebuilding blocks of remarkable results.