When you are discontent, you always want more, more, more. Your desire can never be satisfied. But when you practice contentment, you can say to yourself, 'Oh yes - I already have everything that I really need.'
A poet or prose narrator usually looks back on what he has achieved against a backdrop of the years that have passed, generally finding that some of these achievements are acceptable, while others are less so.
Teen movies often have an unspoken underlying premise in which high school is seen as less serious than the adult world. But when your head is encased in that microcosm it's the most serious time of your life.