Remember what you thought about something you saw today. It might be a book, it might be a sentence. In order to let myself remember the content of the book, or to speak to myself that I felt deeply about a certain sentence at that time. Note: All the comments in this work are my true thoughts. I think this way and write this way. It is only my personal opinion. (It may be a little one-sided and a little naive, but they are all "facts" that I feel)