Quote 52
I stare at my name on the board. My cheeks feel hot. Al and Christina are just trying to help, but the fact that they don't believe, not even in a tiny corner of their minds, that I have a chance against Peter bothers me. (10.25)
Competition calls up all sorts of feelings for Tris, and even leads her to question her friendships. Seriously, what are friends for if now to give you a whole bunch of false hope?
Quote 53
"What do we get if we win?" someone shouts.
"Sounds like the kind of question someone not from Dauntless would ask," says Four, raising an eyebrow. "You get to win, of course." (12.23-4)
As Tris notes, the Dauntless are very interested in pride (13.9). So they don't reward winning a competition with a stuffed animal or kewpie doll. The real prize of competition is bragging rights and proving that you're better than other people. That sure sounds like a nice community to live in said no one ever.
Quote 54
Once they're halfway through the Dauntless-born initiates, I have an idea of what it is. With the exception of Will and a couple of the others, we all share the same body type: narrow shoulders, small frames. All the people on Eric's team are broad and strong. Just yesterday, Four told me I was fast. We will all be faster than Eric's team, which will probably be good for capture the flag—I haven't played before, but I know it's a game of speed rather than brute force. I cover a smile with my hand. Eric is more ruthless than Four, but Four is smarter. (12.44)
While the initiates have their competition, the older Dauntless have theirs. Eric and Four were in the same initiate group, so they've probably been competing non-stop for two years. Because once you're in Dauntless, you're constantly judging yourself against others. Who is more ruthless? Who is smarter? Who's got better tattoos?