humanity and mortality

I am reading the snows of kilimanjaro, the Hemingway's novel.

The story is about the last hours of the life of a man, in africa, because the gangrene in his leg.He is in front of his mortality. 

 Today people don't like to speak about death, but at each instant of my life I am mortal

 My mortality is not outside me, but inside me. I am human because I am mortal.