I posted this because I've lived with a disability for about 20 years now. The first 2 years I had a terrible time getting past the word "can't" and I fought depression. Can't do this, Can't do that became a focus.
Took a while to shift focus and find out exactly what I could do. And believe me, that was a lot of "can do"! Sometimes, your path in life shifts suddenly. I now believe that it's all meant to give you a new focus and move you to where you should be.
As we age, we may find ourselves needing to shift to new things due to our physical conditions. Remember Stephen Hawking. He had it right.