the reason we are afraid of death is necessary for our growth, and the growth of our species. For when we die, we DO live again, but imagine if we knew that for sure. The fear of death would go, and there would be nothing keeping us from doing ourselves in and going on to a new life if problems arose in this present one. We wouldn't want to cope, to deal with anything. There would be no pain and no suffering, for surely if we were faced with such, we would think "fuck that" and go on to the next life. The fear of death, the uncertainty of what happens next, therefore, enusres that we continue to try; that we do our best to overcome seemingly insurmountable difficulties, the hardest of times, for it is through these times that we grow. And we take these lessons we have learned to the next life and, having grown, we continue to make things better.