I have mixed feelings about this book. While obviously written with good intentions and containing many little gems of wisdom - I find the approach being too much "Christian science-y" (as a figure of speach) for my liking.
The psychological knowledge sure is interesting, yet in the core of Christianity there is a living relationship with Christ - and this loving relationship with God should be accented much more than the fast-track habits for example. While I understand that this should be some guide for Christian leaders (who then should know God and be intentional with the relationship with HIm), yet I still think that any leader (or any Christian) should deepen his relationship with God at the very first place to be able to evolve and mature. I am missing this approach and this humility here.