For the ones that can be achieved, certainly. In the broadest sense of the definition that I know, at that. Humanity has all of the potential in the world to achieve a good deal of vital and incredibly important things though we haven't gotten there yet.
I fully support tilting at windmills, and all the rest, but this is not...This is something rather different that fighting for a republic, or for an answer to hunger or poverty or all the rest. Those are possible, with time and effort and skill and love.
Knowing you were a leader in not one, but two rebellions and one full fledged revolution that was near successful, and that you saved lives as a doctor, even when it was hard...those are impossible things that were worth fighting for, certainly.
They were easier for me, by far, than trying to get from bed to the couch and back again, or sleep like a normal human, or be able to sit on the floor again, or insert other things requiring movement here. That's the impossible I'm tired of fighting for. It isn't that I can't, it's that it hurts too much to want to.