Accepting our own mortality is difficult for most of us.  I don't think I really accepted that I was mortal until my younger brother died.  Probably most people come to the realization in a similar way.  Some don't want to accept it, but it is important for us to do so.  We must accept that out physical body is mortal otherwise, we have little incentive to concentrate on development of our immortal spirit and soul.
    Some people believe the physical body can be made immortal and they can live forever in there present physical form.  The medical and scientific communities have taken advantage of this by developing all sorts of methods of extending life by a few years or a few decades.  Major magazine have done articles on it, predicting that soon medical science will make us immortal. And some have had, or plan to have, their bodies frozen when they die so that some day, when medical science has eliminated all disease and aging, they can be brought back.  Their giant egos can't accept that even if it becomes possible, there is no reason for anyone to want to bring them back.
    In any case, a little thinking should tell us how impossible the goal is.  Planets die.  Stars die.  The sun will die.  The galaxy will die.  Where is your immortal physical body going to live?  Would you just keep flying some kind of starship from galaxy to galaxy?  Right, good luck with that.
    I can't buy that fantasy, so I concern myself with developing my spirit and soul which is immortal, and always will be because they existed before there was a physical universe and they will exist long after it is gone.  But every though it is immortal, your soul has to be developed, nourished.  We are born with souls that are in a state similar to a coma.  An egg waiting to hatch.  We need to awaken it through God's Light which nourishes the soul.  This is the true meaning of being born again.