The author writes:
"Memories are a personal affair. They are what comes to mind when you think back, not what might in fact have happened at that earlier time in your life. You can no longer be certain of what seemed important then, because you are now looking at the past with today’s eyes. The Italian philosopher Giambattista Vico had that insight three hundred years ago: When we think of things that lie in the past, we see them in terms of the concepts we have now."