Sometimes the Christian idea that there is life after death can be tough for people in our cultural setting to accept. I think the resurrection of Jesus provides the ultimate basis for the Christian hope, but more basically, within the realm of natural revelation and common grace, I think the finitude of natural reality is also suggestive. If at one time the universe was not, and then at another time it was, then there must be something beyond the universe. And if there is something beyond the universe, its not difficult to imagine that expiring within the universe is a sort of transit to whatever is outside the universe. In other words, if the physical universe is not the ultimate Fact which is, then the best way to see it as a kind of laboratory, preparing us for whatever (or Whoever) put it here.