Therefore, natural processes predict aliveness to continue after disorganization. Analogies from Nature. Plato made his argument for life after death following a visit to his beloved teacher Socrates who was preparing to drink hemlock for execution. Plato explored the question primarily from analogies found in nature. Everywhere he looked he saw cycles.
Spring follows winter follows autumn follows summer follows spring, etc.
A blossom produces fruit, which produces a seed, which dies, which then produces a plant, etc. Demands of Justice. Immanuel Kant, one of the most significant philosophers of all time, approached this question from the perspective of justice. First, he observed that all human beings have some sense of moral duty. For that moral duty to be meaningful they must have some system of rewards and punishment.