Who said "Work that matters is never easy."?

This quote is attributed to Arrow.

Work that matters is never easy. - Arrow

"Work that matters is never easy."

Arrow Work

"My name is Oliver Queen. After five years in hell, I have come home with only one goal: to save my city."

"I'm not the man I was."

"You have failed this city."

"I'm a monster."

"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."