We cannot say for certain why life ends, only that everything in the universe transforms from one state to the next, and that in our search for what happens after we go, most of us land, for good reason, on faith.
I find no clean relief in any story about life and death, and aging unsettles me personally, but that dread is simply the mind doing what it was built to do, and it is the quieter observer behind the thinking that can gently settle it down.
There is no solid answer to what happens after we die, and aging cannot be stopped, so what I recommend, and what I have had to do myself, is spend real time, not hours but weeks, feeling the full weight of that grief, because when we let it move through us rather than bypass it, it puts us in contact with what we actually value.
Once you go into that darkness and come back out, something shifts, and you find yourself asking not how to escape what is coming, but what you can do with the time you actually have, and whether you are living according to that purpose right now.
What I have come to understand is that the more I help others, through writing, teaching, small acts of service, and not acting out from my anxiety in ways that damage people around me, the more I practice genuine non-harm and compassion, the more I feel aligned with what life actually is, a cooperation between one thing and the next, and that alignment brings me real peace.
At this stage I do not have time to dwell on what is coming, and each time the thought of mortality surfaces the observer tells the mind to come back to now and breathe, because there will be more grieving ahead, more days of feeling low, and then back on my feet again, working as hard as I can in favor of health and a long life, and that is it, there are no hacks.
Some people will try to cheat aging, spending enormous energy and money on workarounds that are not sustainable, but avoidance feeds the loop, and the more you do to escape the reality the more fear it generates, when the real solution is simply to sit quietly, breathe, and practice.
If you are coming to this late and your habits have spent years reinforcing anxiety, you are not out of options, just starting from further back, and the path is the same, because a purpose in life includes developing your character, identifying the flaws and defenses that make it hard to be at peace with others, and working on them, not perfectly, just honestly.
These are not platitudes but something true about maturity and reality, because the present moment is all we actually have, and while planning is not the same as worry, since planning has an object and an action while worry just circles, tomorrow may never come, and if it does not, you will have spent your time on something that was never in front of you.
Take your attention off the future and direct it toward the fact that you exist, that you are here, that there is still time, because the ache of loss is not a flaw, it is evidence of how much living has meant to you.
For some people none of this will be enough, and if that is you, return to the breath, return to presence, and if you carry a spiritual or religious faith lean into it, because your tradition tells you that a life lived with moral care and compassion is its own salvation and that in death you will return to the source, and the point is the same regardless of the path, come back, breathe, be here, make it mean something.