We cannot know what is beyond life. This is due to our lack of ability to perceive events beyond our control and self. It is this ‘unknown’ quality that stirs the fears; and sometimes death is treated as a purely irrational state.
I was given the question ‘is death rational?’, a statement mystical in itself. It was necessary to do some reading around to see what sorts of opinions there are on whether the motion of death is a sensible one to consider.
One way to answer is to look at different opinions of the rationality of death. Those who believe in God see death only a transition, not an end, and therefore have less of a ‘fear’ of it. Often, they are prepared by the Church, Scriptures and their loved ones, leading them to treat the prospect of death with a more open mind. They see death as rational because it is part of God’s plan – and God is a Perfect being with no ability to create an irrational supposition.
Atheists might take the scientific route to death as a rational change: that evolution and natural selection would become less effective were there not the point of less successful life-forms dying so that those more successful might survive.
Death can be a difficult subject to consider, due to its touchy nature and its unpredictability. Is death rational in and of itself? Perhaps we need death to keep our population at a steady rate, to reminder ourselves that things do not last and that we must keep a calm head when lingering on the prospect. Death is rational, in that it helps us value what we already have, to keep us from taking everything for granted.