For those familiar with or having interest in the work of F. M. Alexander, possibly one of the more important and insufficiently recognized thinkers of the 20th century, this book is essential reading. In it he elaborates in greater depth, and I think after the perspective of further years of experience, upon his ideas about how the human race can be helped by the use of conscious work to eliminate harmful habits and reactions. It takes some effort to stay with his train of thought, (his language and writing structure, with some very long, elaborate sentences is not always easy going) but it is well worth the effort.