What does it mean to "fight for your life?"

So I spoke to my friend Bryan last night and was telling him bhow I have spent the last month coming to grips with the fact that I have this potentially fatal disease I mean all aspects of it like death. Man it took a long time for me to get over the hurdle of seriously accepting the fact that I may croak pretty soon. Took me all month.
He told me it is like a soldier at war, if you are going to jump out of that ditch thing and rush the enemy you must be ready for ANYTHING. Wounded, disfigured, disabled...anything.
I am going into the fight of my life. Thats me and the cancer tTO THE DEATH!!!! Okay that sounded alot better in my head but I am going to leave it there. Where was I, oh yeah fighting: I have become as accepting as a 28 year old can be about ones own demise but I am still not okay with being disabled. I mean look people: talking is obviously my lifeline. I am going to have to go into this being ok with only 3/4 of the options. But I have to accept all the options, that way I won't forget even for a second what I am fighting for and who I fighting against.

Comming to get ya Snarla (evil bitch)