Who said "The only certainty in life is that things will go wrong."?

This quote is attributed to Peter Griffin.

The only certainty in life is that things will go wrong. - Peter Griffin

"The only certainty in life is that things will go wrong."

Peter Griffin Truth

"Shut up, Meg."

"All right, all right, I'm coming, Elizabeth."

"Giggity!"

"You know what really grinds my gears?"

"Lucy, you got some 'splainin' to do!"

"You must always be honest with the people you love."

"Truth always comes out in the end."

"Honesty is always the best policy."