What I Got Wrong in More Than Two: The Dark Night of the Soul
brighterthansunflowers.com
There's a passage in More Than Two that I profoundly regret. I don't know if it's the most harmful thing in the book, but I know it underpins a lot of other harm.

You may have already read this article, or possibly read the book (or website) but a lot of people don’t realize the regret that the authors had after publishing this book.

There are a lot of things I fucked up in More Than Two. I recently wrote about how hard it is for me to even look at the book, and how it’s going to be awhile before I can really dig in to what I think the problems with it are.