Who said "Work is the crucible in which strength is forged."?

This quote is attributed to Black Sky.

Work is the crucible in which strength is forged. - Black Sky

"Work is the crucible in which strength is forged."

Black Sky Work

"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."

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."