The study of death is key to understanding mental processes. Without a close acquaintance with the experience of death and the process of death-rebirth, it is impossible to understand religion, mysticism, shamanism, mythology. According to various mystical schools, people who have survived death or mortal danger and have returned to life are called twice born. Contact with death changes the attitude towards it, regardless of whether this contact is purely symbolic or actually occurs, for example, as a result of accidents or in the course of events leading to real clinical death.