Who said "Death is the only absolute certainty we possess."?

Death is the only absolute certainty we possess. - K

"Death is the only absolute certainty we possess."

K Death

"I was born, but not alive. I exist to serve."

"Love is a memory. Memories can be implanted."

"To know yourself, you must first know what you are."

"Happiness is a luxury for those who can afford uncertainty."

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."