Language ability

I am reading the book shown in the picture. The title is too much leap, but I can understand the point of this book. For example, improving reading comprehension and expression will make the communication smooth, which will lead to have not only business ability but also riches of whole life. I have to take a proactive approach in daily life to enhance the ability related to language. I could empathize most part in this book, but I couldn’t understand the meaning of reading classic literature even now.