one more...

"[Someone] who's happy when its natural, and sad and disappointed and frustrated when that's natural. But someone who never pushes those feelings on themselves because they think thats how it should be. Someone who lets themselves feel crummy and bad when things are crummy and bad because they know that that's ok - even though in the end things will be ok. More than ok, in fact. Things will be wonderful. I think that's optimism."

Marilyn says it perfectly!