Who said "Working hard on yourself is never wasted effort."?

This quote is attributed to Ken.

Working hard on yourself is never wasted effort. - Ken

"Working hard on yourself is never wasted effort."

Ken Work

"I'm Ken. Life in the Dreamhouse is pretty perfect."

"Being perfect is exhausting, but I make it look easy."

"You know what's great? Everything about me."

"I believe in living in the moment and enjoying every day."

"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."