Who said "I've got to get out there and do it."?

This quote is attributed to George Costanza.

I've got to get out there and do it. - George Costanza

"I've got to get out there and do it."

George Costanza Courage

"I'm out there Jerry, and I'm lovin' every minute of it."

"These pretzels are making me thirsty."

"Master of my domain."

"It's not a lie if you believe it."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."