I worry that reading only the testimony, divorced from the explanation of how someone moves along in personal progress to the point they receive that personal witness, will make it just another "feel good" read. The book is a manual. It isn't designed to make people feel good. It is designed to get them to do something.
So I think taking only the testimony alone contradicts the whole purpose for which it was written. The testimony was merely a brief, nine word ratification of the book's teachings. The focus was, and is, on receiving an audience with Christ. The book is a manual for the reader to do that for themselves. The reader, not the author, is the focus of the book. Indeed, with only brief exceptions, my personal presence intrudes into the book to highlight how to do something wrong. Then the book explains how to get it right.