The popular belief in immortality which in the Western world has largely replaced the Christian symbol of resurrection is a mixture of courage and escape. It tries to maintain one’s self-affirmation even in the face of one’s having to die. But it does this by continuing one’s finitude, that is one’s having to die, infinitely, so that the actual death never will occur. This, however, is an illusion and, logically speaking, a contradiction in terms. It makes endless what, by definition, must come to an end. The “immortality of the soul” is a poor symbol for the courage to be in the face of one’s having to die.
Paul Tillich, The Courage to Be