The book is basically an exploration of the titles/topics of the chapters (Sin, Sanctification, Holiness, the Fight, the Cost, and Growth), which are all relatively self-contained, although, as Packer notes, the flow of thought is obvious. Ryle does spend quite a bit of time in the book refuting and explaining the consequences of a error about sanctification prevalent in his day, though not so much now, but it is not much of a distraction and in fact challenges us to think of our responses to similar problems today. Ryle's writing confronts you with your life, and I don't think you will be left unchanged, and so I cannot fail to commend this book to you. The language is not hard, only a hundred years old, and style has not changed that much, and the different context in which it is wrote does not distance you too much from the points he makes. This book is well worth buying, and reading, especially at this incredibly [low] price.