Life After Death

[Lestat]

Even if God does exist it certainly doesn't follow there must be life after death. In fact, if the chance for God is one in a million, then life after death has to be some number considerably higher than that (albeit somewhat lower if there IS a God).

After 3 months of reading this forum I have an idea of the logic people use to conlude the existence of God (bible notwithstanding). But can anyone please explain the logic used to conclude there must be life after death? (again, bible notwithstanding). If the idea of God is ludricous to some, then life after death is sheer preposterousness!