Optimism doesn't make you more persistent. Persistence makes you more optimistic.

Persistence Pays...Period.

We needed an actor who could convey the character's blend of optimism, recklessness, misguided persistence and likeability. In addition to his obvious talents as an actor, Robert Downey Jr. exudes a boyish charm and an appeal that is perfect for Harry.

Let's do everything that we can, and let the good Lord do everything else that we can't.

Integrity is the bond of trust.

Be persistent like a mosquito, at the end you will get your bite