Who said "Loneliness is the real enemy, not the criminals."?

This quote is attributed to Arrow.

Loneliness is the real enemy, not the criminals. - Arrow

"Loneliness is the real enemy, not the criminals."

Arrow Solitude

"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."

"Sometimes being the best means being the loneliest."

"Solitude gives us time to reflect on what matters"

"I'm not good with people, never have been."

"I feel like I'm disappearing."