The Master of 5 excellencies, Cheng Man Ching leaves us his wisdom through these words, and through these insights we learn something of why this man has left such a powerful legacy in the world of Tai Chi Chuan. Of all the teachers from the 20th century, it was perhaps Cheng Man Ching that understood the need for adaptation and evolution in this formidable yet flexible martial art. It is never enough to study the moves, or the angles and postures, one needs to probe deeper, and to ask questions not about how, but about why. This book is an invaluable asset to any serious student of Tai Chi.