What is health? This question figures prominently in several ethical, medicinal and psychological issues. Against this background the paper investigates the definition and the understanding of health in Karl Barth‘s dogmatics in its theological framework. The reconstruction provides a model of health, which allows treating contemporary issues, because it presents a dynamic and relational model with several dimensions, including the dimension of will. The will to health, though depending on somatic, psychic and social conditions, plays an important role in handling (...) with diseases, in living with imperfections and in supporting healthy lifestyle and preventive measures. This will must be interpreted as the will and the power to be a human being with its gifts and limits. (shrink)