This thesis is about the content and concerns of each of four disciplines pertaining to the field of bioethics: medicine, philosophy, religion and law. Emphasis is put on the human values each reflects in patients' lives. A last chapter is dedicated to patients' narrative in order to bring a practical perspective to the discussions of the previous chapters. The four essential human values interconnecting among the four disciplines are: the patients' need for authority, the need for protection, the existential questioning (...) about the meaning of life, and the fear of death. (shrink)