How to write the preface when the Lord knocks on my heart?

The Lord Knocks at My Heart is a book about self-exploration and inner growth. Writing a preface should give readers a comprehensive understanding of the book. In the preface, the author can briefly introduce himself and the background and purpose of this book, and explain why he wrote this book. You can preview the main topics and problems to be introduced in the book, so that readers can have a general understanding of what they are about to read. In addition, you can also introduce some background knowledge related to this book or similar works that appeared earlier, so that readers can understand the cultural and historical background of this book. In short, the preface should give readers a preliminary understanding of the book, stimulate their interest and make them more willing to continue reading the book.