In those days that technology did not yet exist, we use typewriter in order to write something on the paper while hitting the keys.
Writing on the typewriter is basically the same as when we write down our own history and memories. Unlike the present computer that has the document processor today, you “cannot undo” anything when you make a mistake in writing in the typewriter. Definitely, when you got a lot of mistakes, you can literally throw away that paper, and you can put a new paper and to start all over again.
Writing on the typewriter is basically the same when we are writing our own lives in a book. We all understand that nobody’s perfect. We cannot undo everything that we had written on our history book of our own lives.