Why does religion appeal to our selfishness? Why must eternal life be the reward for following Jesus? Why not serve God and then perish?
What is “eternity” anyway? We cannot conceive an infinity of time. “Eternal life” means that we will never face the moment when we know we will die. This moment is what we fear, not death itself.
May I suggest a workaround to your fear of death? When that moment is presented to you, fantasize about something else. Imagine you are in a much better place and time. Take your mind off the present. If you can do this, you no longer need fear death. (If you do not have the imaginative powers to fantasize, then devote your life to developing such powers).
The only reason to seek immortality is because one is confused about death, which means one is confused about life. Every day we lose consciousness when we sleep, which does not terrify us. We believe we will wake up again. In essence, we believe in our own resurrection. This belief separates sleep from death. It is a fine line.
Is eternal life really such a desirable thing? Won’t you get incredibly bored? You will repeat the same pattern in your life millions, billions, trillions of times (and more). Isn’t it better to lead a rewarding life and then gracefully (and hopefully painlessly) check out? Worried about facing death? See the above workaround.
Christians believe in “heaven forever”, meaning a wonderful situation that persists. Can we really imagine this? The only way to avoid boredom is to periodically forget one’s past. Isn’t that the same as the “old” you dying and a “new” you taking it’s place? If you forget your past, your are effectively a different person. Therefore, you have effectively died because your old self is gone.
Embrace the transient nature of your life, which is in fact a wonderful gift.