My response to "How to mark a book" by Mortimer J. Adler

Adler has shown how to mark a book and how it is important for the reading. It helps people remember the main idea and arrange the thoughts. He also points out three different book owners who use books differently. One buys books but never touches them. One buys books, reads books but do not know what the books are about. The other one read, and mark the book so that everything would stay not only on the page but also stay in the head. Marking up a book help us remember what particular word, phrase, or paragraph is important and express the main idea. Marking book is a good way of remembering; however, beside marking a book, we have to write our thought next to where we mark in order to know what our ideas about that particular idea. If we do not write down any idea or thought, all of the information and our thought would disappear easily. Therefore, while marking a book, why don't we write down our thought.