Let today be the day you stop being haunted by the ghost of yesterday. Holding a grudge & harboring anger/resentment is poison to the soul. Get even with people...but not those who have hurt us, forget them, instead get even with those who have helped us.
A very small percentage of the people in this world will actually experience and live today. So many people will be stuck on another day, another time that traumatized them and caused them to spiritually stutter so they miss out on this day.
A young outcast will often feel that there is something wrong with himself, but as he gets older, grows more confident in who he is, he will adapt, he will begin to feel that there is something wrong with everyone else.