It's good to be reminded that other people can and will cause problems for us if we let them. We also need to be reminded that we can cause problems for ourselves if we continue to act on emotions in a harmful way. It's good to be reminded that it is helpful to be aware of our own flaws and our emotional reactions to those flaws. It's good to be reminded that we ought to challenge our own assumptions. (Again, these are my observations after reading 63 pages).