Analysis of Parkinson's Disease

It's called Parkinson's Disease it is real,
    they say I have it,
          of lying they are not in the habit,

one third of three is my chances of survival,
    I will fight this thing,
         no matter what the future may bring.

In three years, the end maybe drawing near.
    after that there is less fear,
         my end it may not seal.

The tremor I have I was frightened by its arrival,
    I will continue to fight,
        I think that is right.

I will not go gently into the night,
    it may not be a pretty sight,
        but I will resist with all my might.