@Former-Member, been mulling over your post a bit.
Re. faith... I'm someone who doesn't have much patience with the "rejoice and it will all be OK" school of thought. I do think it's incredibly important to be on the lookout for "whatever is beautiful, excellent, praiseworthy" etc. in day to day life, but mourning is an OK thing too. "A sad face is good for the heart." Honesty with ourselves, the truth of what we're feeling, yes.
Years ago, I had to have emergency surgery. While recovering from that, and since, I've realised that there's a lot of differences between a critical event causing debilitation and a condition that results in slow degeneration. Both may bring the person to the same end point, but the slow process sneaks up to it, and the little adjustments the person makes to cope with the gradual loss of ability sometimes mask the extent of the debilitation until it reaches "critical".
We can't pinpoint any starting point with our daughter's MI. In parallel with that, it's hard to measure how much the strain of caring has immobilised us because it's been happening slowly. I do know that I've gradually had to let go of one thing after another, and I've battled to hang on to a lot of those until I couldn't keep holding on any more.
I think a lot of the "let go" things have been metaphorically "put in storage" rather than completely abandoned. I still buy books, even though I rarely find the energy to sit down and read one; I have all my pottery supplies and other art materials and tools waiting to be dusted off; I keep making little notes, and saving pictures and articles from the web, and buying magazines that are "one day" likely to be relevant to the big fix-up that our beloved scruffy old house needs so badly. And all that reflects the hope that "one day" life will get back to the point where I can make plans and set goals. (I have managed to hold on to gardening, even if it does spend a lot of time looking weedy! Oooh, that sounds like a metaphor all on its own...)