Our brain works like shelves in our room. We start putting books on a shelf and suddenly we create a personal collection of books. We can go to the shelf and take a book at any time to consult an specific subject and then put it back. The book will then stay there at our disposal for any future reference.
Likewise, we choose what to put and keep in our minds. The more interesting, creative, out-of-the-box, challenging content we surround, the greater our archive of knowledge tools will be.
Use your shelves.