"There's more to life than being happy"
The one thing that will hold true for as long as humans live, no mater what TV, romances, cartoons, soap operas or even your parents tell you. We should remind ourselves that yes, things can always get worse, once we acknowledge that we can move on to dealing with it - I learned this by myself, albeit in a situation far far far far far less serious and inhuman as the one portrayed here.
As he saw in the camps, those who found meaning even in the most horrendous circumstances were far more resilient to suffering than those who did not. "Everything can be taken from a man but one thing," Frankl wrote in Man's Search for Meaning, "the last of the human freedoms -- to choose one's attitude in any given set of circumstances, to choose one's own way."