Is Happiness a Measure of the Gap Between How Things Are Going and My Expectations?

Happiness is a measure of the gap between how things are going and my expectations. Rigt: If i know that there are things that i'm not going to be able to change, no matter what i do, they are not going to change, then i can either be really, really mad about them or work on improving their situation. He says if you don't know what a normal is, you can't know if things are deviating from a normal. "Sometimes you just find out about things too late to really beable to fix the problem"