This article examines aspects of life and death across various dimensions of human experience. Life is a process of individual development: birth, growth, reproduction, and aging. It is characterized by the ability to reproduce, adapt to the environment, and accumulate experience. The genetic continuity of offspring ensures the immortality of humanity. A human mental characteristic is the awareness of one's own mortality. This gives rise to the fear of death and the search for meaning in life. Awareness of death imbues life with value and encourages authentic living. Religions offer a way to overcome the fear of death through faith in resurrection for eternal life. Modern research seeks ways to prolong life or overcome death through the fight against aging. Life and death are multifaceted phenomena that permeate all levels of human existence. Understanding them helps find motivation for a full life and develop ethical standards in medicine and society.