Who said "The unknown calls to those brave enough to answer."?

This quote is attributed to Fox Mulder.

The unknown calls to those brave enough to answer. - Fox Mulder

"The unknown calls to those brave enough to answer."

Fox Mulder Adventure

"The truth is out there."

"I want to believe."

"Trust no one."

"The answers are in the questions we're afraid to ask."

"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."