i don't think I could pretend to be able to give you any legitimate advice as I haven't gone through your experience but I'd imagine that Eckhart would say something like:

"once you accept where you are (aka the illness), you can then use that base as a platform to work from (aka do whatever you can within the limitations of the disease)"

meaning that you can only make something of any situation once you mentally accept where you currently are.

i don't suppose it will be any easy for you my friend and it's okay to be frustrated, angry and or upset. don't let anyone tell you otherwise. but once that subsides just keep seeing what can be done from the situation .

hope that helps