Immortality cannot be accounted for in terms of the isolated individual existent and its native capacities, but only by reference to that relatedness which is constitutive of human nature... God too possesses immortality, or, more correctly he is immortality, being that actuality of relationship which is Trinitarian love. God is not "atomic": he is relationship, since he is love. It is for this reason that he is life. In this perspective, the relationship of two people which is human love shines with the radiance of the eternal mystery. The signal we derive from this view of being tells us: relation makes immortal; openness, not closure, is the end in which we find our beginning.
Eschatology: Death and Eternal Life, Joseph Ratzinger
