24 "Immortality" in a Christian sense means the survival of man after his terrestrial death, for the purpose of eternal reward or punishment. Whoever only means by the term, the collective survival here on earth of his people for an indefinite length of time, distorts one of the fundamental notions of the Christian Faith and tampers with the very foundations of the religious concept of the universe, which requires a moral order.
Source: Mit Brennender Sorge (Vatican.va)