For man is sick at least to the same extent as he is healthy. Illness and health belong together like light and darkness, like yin and yang, and however you may label polarities. With his concept that illness is information and a path to self-awareness and true healing, Thorwald Dethlefsen became known to millions. Understanding the different forms of illness is not always easy for beginners, and so Dethlefsen provides a wealth of insights and suggestions in this lecture. Illness is like an alarm system – it is meant to indicate something and is not an end in itself. The symptoms of illness are not very important; they merely point to the underlying problem area. Merely suppressing the symptom to make it disappear has nothing to do with healing.