How do I cope when my body is worn out from labor?

You could always do the hardest physical work, the jobs that broke other people, and now your body is presenting the bill for all those years. That is not a betrayal by your body. It is the honest arithmetic of a life of hard labor, and there is a strange dignity in it, even as it hurts. You spent yourself on real work, and the aches are the receipt. The grief underneath is often less about the pain and more about identity: if your strength was who you were, what are you now that it is fading? But your worth was never only in what your body could lift. It was in the reliability, the skill, the knowing-how that lives in you still. That does not wear out with the joints. It can be handed on, taught, put to lighter but no less valuable use. So start treating your body as something to steward now, not spend: take the pain seriously, get the care you have put off, and look honestly at work that trades brute force for the wisdom you have earned. You gave your strength to good work. Now let that same toughness go toward lasting, not just enduring.