Nicolau, I'm like some of the others who've posted: I was a born-in who was supposed to see the "new world" before I finished high school. I firmly believed that I had a chance of never dying. After getting out a few years ago--at around age 40--I finally had to face my mortality, and it was a shock to me. I haven't replaced my former beliefs with any other afterlife hope, so sometimes I do get scared of dying, thinking about what I might miss out on (grandkids, further learning, etc.).
However, when I'm feeling ill with a bad flu or something, and I just want to lie in bed and go to sleep so my body will stop aching, then I understand how so many old people accept death and are ready for it. So now, while I do fear dying 'before my time,' I think I'll be ready for it when I've lived a full life and my broken down body wants relief.