Who said "Failure and death they are but shadows to me."?

This quote is attributed to Voldemort.

Failure and death they are but shadows to me. - Voldemort

"Failure and death they are but shadows to me."

Voldemort Death

"There is no good and evil, there is only power, and those too weak to seek it."

"I have grown stronger than I was, more terrible, more powerful."

"Fear of a name increases fear of the thing itself."

"I am not concerned with alchemy or the secrets of death."

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."