The Question and Answer section for Divergent is a great resource to ask questions, find answers, and discuss the novel.
In context, the tone is sarcastic.
From the text:
I tell myself, as sternly as possible, that is how things work here. We do dangerous things and people die. People die, and we move on to the next dangerous thing. The sooner that lesson sinks in, the better chance I have at...
Tris is shot by David in the Allegiant novel.