“There is a difference,” she said, “between immediate recall of facts and an ability to recall a gestalt of knowledge. We can’t retrieve the specifics, but to adapt a phrase of William James’s, there is a wraith of memory. The information you get from a book is stored in networks. We have an extraordinary capacity for storage, and much more is there than you realize. It is in some way working on you even though you aren’t thinking about it.”

Did this mean that it hadn’t been a waste of time to read all those books, even if I seemingly couldn’t remember what was in them?

“It’s there,” Wolf said. “You are the sum of it all.”