This question leads to another...why don't people tell these things to their kids?
"You don't have to wait to grow up to do great things. Do something now."
"Embrace the mistakes. They eventually pay off."
"What makes you "different" makes you AMAZING!"
Parents NEVER say these things. Parents say "do your homework", "practice the piano", "be nice to your sister". If, god forbid, I ever have a child I will have a very difficult time resisting the urge to tell him or her what life is really about. If I knew then what I know now... how could I keep that same valuable knowledge from someone I care about?