I am 77 and I have a slowly debilitating muscle disease. I lose muscle strength ever so gradually. If I move too quick and fall over backwards, I usually knock myself out. No drugs for such, only thing that helps is exercise. I don't have the strength to exercise as I would like. I still love the old car hobby and I have my projects and dreams. I still get a thrill every time I complete even the smallest of task. Like the man said, stop dreaming and die.
Good thing I have a good wife. She spent 2 hours watching and helping when I asked , just this morning. I was under the car on my back, clamping, welding and then using the impact and cut off wheel to get ride of the trailer bumper hitch some PO put on there, many decades ago. I got it done (2 hours), one leg cramp, a few welding burns, (no, I did not cut of any limbs with the wheel of death) I was able to crawl (sorta) out of from under the car, and she helped me get back up.
No, I am not tough, I am just not ready to completely give up. I come close some days. God gave me life, I am obligated to use it as long as I can.