“At some point, my breathing will stop altogether or I will become so helpless that I will be effectively entombed in my own body. I would not like to live like this. I would find it a totally undignified state for me to live in. I find the prospect of this state for me to live quite unacceptable and I wish to end my life when I feel it is the right moment to do so, in a way that is swift and dignified.”