The quote from "Winter's Tale" by Mark Helprin highlights the profound impact that certain books can have on readers. These books, described as difficult to read yet transformative, possess the power to challenge one’s understanding and feelings. They can touch the soul deeply, potentially leading to significant changes in perspective or emotion.
The imagery of a book delivering a "kick like a mule" emphasizes the intense experience one may face upon completing such literature. It suggests that these stories, while potentially difficult, leave a lasting impression, causing readers to reflect profoundly on their lives and beliefs.