Who said "Life goes on, and we have to go on with it."?

This quote is attributed to Butters Stotch.

Life goes on, and we have to go on with it. - Butters Stotch

"Life goes on, and we have to go on with it."

Butters Stotch Death

"I'm not bad, I'm just drawn that way"

"Aw, hamburgers!"

"You're grounded, mister!"

"I have to go do my chores now"

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."