Why do so many teach the promise of life after death, of something eternal, of something imperishable? This takes us to the heart of the matter.
What is the meaning of this concern with immortality? Why do we human being seek immortality? Why do we want to live longer or forever? Is it really first and most because we do not want to die, because we do not want to leave this embodied life on earth or give up our earthly pastimes, because we want to see more and do more? I do not think so. This may be what we say, but it is not what we finally mean, Morality as such is not our defect, nor bodily immortality our goal, Rather, mortality is at most a pointer, a derivative manifestation, or an accompaniment of some deeper deficiency. The promise of immortality and eternity answers rather to a deep truth about the human soul: the human soul yearns for, longs for, aspires to some condition, some state, some goal toward which our earthly activities are directed but which cannot be attained in earthly life. Our soul’s reach exceeds our grasp; it seeks more than continuance; it reaches for something beyond us, something that for the most part eludes us. Our distress with mortality is derivative manifestation of the conflict between the transcendent longings of the soul and the all-too-finite powers and fleshly concerns of the body.
What is it that we lack and long for, but cannot reach?
Leon R. Kass – Life, Liberty, and the Defense of Dignity: The Challenge for Bioethics p.269