Quite rich - I just finished reading this book twice in the last week. A few chapters are a little dry in the middle, but otherwise a very fabulous work that completely overshadows the two tedious chapters; where he is laying some ground work. A very well-explained description of spiritual formation and description of spiritual disciplines. The chapter on doing/being as it relates to disciplines is worth the price of the book alone.
In addition, it is very applicational for the reader (although he describes a couple of instances in his journey, I would have liked to see more of his own personal learning added).
In my opinion this book (originally written in 1985) is "way ahead of its time" in bridging mainline, mystical, and evangelical thought - although it never makes those distinctives.
I would say that perhaps he slightly over-emphasizes the formational (vs informational) but I would also add this very important point: that it is this exact over-emphasis that is a needed corrective to the balance of our day for most people.
For me this what a provoking book to my spiritual journey. I am very thankful - there are about a dozen different passages that struck me.
In an ever-increasingly information-saturated world; this book offers needed medicine to our souls.
