Christopher Reeve understood that... everything begins with hope. His vision of walking again, his belief that he would be able to in his lifetime, towered over his broken body.
Once I decide to do something, I can't have people telling me I can't. If there's a roadblock, you jump over it, walk around it, crawl under it.
And for myself, I think for the present He is calling me to another land; but how long shall be my abode, or what employment He has for me there, I know not, for I cannot think He is taking me there to live and lurk only.