Who said "Hope springs eternal in the human heart, giggity."?

This quote is attributed to Glenn Quagmire.

Hope springs eternal in the human heart, giggity. - Glenn Quagmire

"Hope springs eternal in the human heart, giggity."

Glenn Quagmire Hope

"Giggity!"

"Allllright!"

"You gotta live life to the fullest, giggity goo!"

"Love is just giggity waiting to happen."

"Every day is a new opportunity."

"Hope is what gets us through difficult times."

"I'm not your enemy, kid. I'm trying to save you."

"Redemption is a long road."