Who said "Adventure calls to those brave enough to answer."?

This quote is attributed to Natasha Romanoff.

Adventure calls to those brave enough to answer. - Natasha Romanoff

"Adventure calls to those brave enough to answer."

Natasha Romanoff Adventure

"I'm not going to fight you."

"Sometimes the best way to solve your own problems is to help someone else."

"I have a very specific skill set."

"You know, I'm actually a very good liar."

"The greatest adventure is life itself."

"The adventure of life begins with a single step."

"Adventure finds you when you stop running."

"Fortune and glory, kid."