What will you do when the health betrays you? Who will you be then?
These are excellent questions. To clarify before I answer them:
(Borrowing an ACT psychology metaphor) I currently view values like compass directions: just like you can't reach West, you can't reach "health" as such. And by "health", I don't really mean "being healthy" as some end state I have to achieve/maintain. I mean more the ongoing direction of respecting, maintaining and looking after my body/mind/spirit as best I can, whatever condition they're in. "Stewardship" is probably a better word for it.
So, if my arms fall off, I just have leg days in the gym or become a runner. If my legs fall off, I do chair Tai Chi. That is, I keep choosing the behaviour that embodies stewardship.
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So to answer your questions:
What will you do when the health betrays you?
Let's say I have terminal cancer. As long as I have options, I'll keep following respect and care for the body as much as I'm able: go to a hospital/hospice, make sure I get painkillers, eat if I can, keep the body clean/washed, etc.
Plus, I still have other values. Autonomy is now also pretty constrained but I can decide which hospital to be cared for in, who can visit me, treatment choice, etc. Connection is there if I interact with family, nurses, doctors, patients, etc.
But getting to the heart of your questions: assuming stewardship, autonomy and connection are my only known values and they become completely trashed, what then?
Let's say I'm lying in bed, can't move, in constant pain, looked after by robots. I'm so drugged I can't think straight. I'm out of options with no real choices for those three values. Having never been in this extreme situation, I'm guessing this experience may reveal previously unknown values. Perhaps I embrace Buddhism and discover that compassion or non-harm matters to me in a way I hadn't previously recognised, and meditation becomes one way of embodying that value. Maybe I'll have a deathbed conversion and discover I value obedience to God or enduring suffering because I believe God has a plan for it. Or perhaps I'll discover that dignity or agency over my own death matters strongly enough that I choose not to prolong the situation.
Who will you be then? I'll still be me whether I experience meaning or not.
Conclusion: as long as there are options, there's room for choice in how I embody my values. New or extreme circumstances may also reveal previously unknown values or cause the value stack to reorder, e.g. Autonomy > Stewardship. Otherwise, yes, if there are genuinely no options available and no new values have been discovered (I have my doubts this is possible while I am still conscious, but let's say this is so for the sake of argument), then by this model I will experience no meaning.
This is precisely the core realization that I think post-nihilism is trying to propose. It is not really even that extreme of a proposal, merely, that when you stop looking for meaning or trying to invent one yourself, one will naturally fall out of whatever it is on its own. Nietzsche is saying that this is the test of one's will, to resist whatever falls out and try to go even deeper, or to treat whatever emerges as a temporary solution, a useful tool, or just a recreational moment where you are just taking a break and letting your imagination run.
I think he is suggesting that with enough self-discipline, rather than through self-control, one can actually overcome the need to look for meaning and direct one's thoughts toward the accomplishment of whatever one has already committed to doing. Once one finds their intention and begins to carry it out, there is no further deliberation, no further consideration given to the meaning or purpose of the act. Whatever meaning or purpose we chose will suffice, given that no meaning and no purpose could ever actually represent whatever it is we think we are doing.
In that sense, any meaning, any purpose that we invent for ourselves, is a pure act of self expression and art when it comes from a place inside yourself and emerges from this process of trying to resist coming to a conclusion about the meaning or purpose of things. It is about the strength to keep walking the path and remain open minded as long as you can, not to make up your mind about things, and to tolerate the dissonance of being immersed into the unknown. We feel compelled to somehow turn it into the "known", just as I am doing right now even.
I'm not sure if I'm in agreement with you or not?
I think we agree that meaning doesn’t need to be objectively imposed and may emerge rather than be consciously invented. Where I’m less sure we agree is that I don’t experience whatever meaning I choose as equally workable. My values seem to constrain what can actually feel meaningful to me. Have I understood you correctly or no?