Who said "Death fears those who have mastered themselves."?

This quote is attributed to Black Sky.

Death fears those who have mastered themselves. - Black Sky

"Death fears those who have mastered themselves."

Black Sky Death

"I am the instrument of my own destiny."

"Weakness is a choice, not a condition."

"The world bends to those willing to break it."

"Pain is simply the price of becoming something more."

"Death doesn't scare me anymore."

"Death and I are old friends."

"Welcome to my world."

"Death is just the beginning."