Belief in immortality represents not merely a religious doctrine but a fundamental human necessity - one that modern discourse increasingly neglects at its peril. Contemporary claims of indifference toward the afterlife mask a deeper self-deception about our existential needs. Through philosophical analysis of Jewish theological perspectives, particularly Talmudic sources and Psalms, alongside contemporary theological scholarship, this investigation reveals how the universal human drive to extend life and our profound grief responses to death point to an inherent need for immortality belief. Without the prospect of continued existence beyond death, human dignity and worth become ultimately nullified, as temporal existence alone cannot provide true self-fulfillment due to its inevitable frustrations, losses, and intellectual limitations. Popular alternative concepts of immortality - through influence or collective memory - prove inadequate substitutes for individual survival. Properly understood, belief in immortality serves as a crucial motivator for ethical living while providing essential meaning to human existence. The contemporary religious tendency to downplay the hereafter thus weakens both its appeal and its capacity to address humanity's deepest questions about cosmic significance and existential purpose.