Who said "The only certainty in life is that nothing is certain."?

This quote is attributed to Fox Mulder.

The only certainty in life is that nothing is certain. - Fox Mulder

"The only certainty in life is that nothing is certain."

Fox Mulder Life

"The truth is out there."

"I want to believe."

"Trust no one."

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

"Life is meant to be lived with passion."

"Life is what happens when you're busy making other plans."

"Life is a journey, not a destination."

"Life's too short for regrets."