Who said "I learned that power corrupts even the best intentions."?

This quote is attributed to Arrow.

I learned that power corrupts even the best intentions. - Arrow

"I learned that power corrupts even the best intentions."

Arrow Power

"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."

"Power without control is just destruction."

"Power is not about control, it's about influence"

"The world doesn't need me to be the hero. It just needs me to be dangerous."

"The claws come out when I need them to."