Who said "Death is the one certainty we all must face."?

This quote is attributed to Waylon Smithers.

Death is the one certainty we all must face. - Waylon Smithers

"Death is the one certainty we all must face."

Waylon Smithers Death

"Mr. Burns is a great man, and I would do anything for him."

"The key to success is hard work and dedication to your employer."

"I live for the moment when Mr. Burns needs me."

"Love is wonderful, but duty comes first."

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."