Where Do so Many Ifs Come From?

A man found a book on his desk. The cover was a bit old and yellow. There were no words or pictures on it. It looked more like a notebook. In fact, this book has been on this table for a while. I have noticed it before and even moved it to clean the table. However, because of my lazy personality, I have never really picked it up and read it. This day was actually not special, but after sitting at the computer for a while, I suddenly picked it up, opened it and took a look.