Sarcasm, cynicism, sourness and shields are not signs of strength but weakness. Don´t let anyone, or anything, destroy your innocence for that is your most precious possession.
True strength resides in trusting after being betrayed; believing after losing faith; loving after being hurt; seeing beauty after seeing ugliness. All of us get hurt and hurt others, knowingly or not; everybody has a story to tell, not always pleasant.
There are two ways of going through life: allowing it to break us or we allowing it to open us. Choose.