" When you drive, for example, you rely automatically on your previous experiences with cars and roads; if you had to focus on every aspect of what your senses are taking in, you’d be overwhelmed and would probably crash. As you learn anything, in fact, your brain is constantly checking current experience against stored templates—essentially memory—of previous, similar situations and sensations, asking “Is this new?” and “Is this something I need to attend to? "

― Bruce D. Perry , The Boy Who Was Raised as a Dog: And Other Stories from a Child Psychiatrist's Notebook