Who said "I don't believe in luck. I believe in preparation."?

This quote is attributed to Arrow.

I don't believe in luck. I believe in preparation. - Arrow

"I don't believe in luck. I believe in preparation."

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."