Who said "Weakness is the only true sin."?

This quote is attributed to Green Goblin.

Weakness is the only true sin. - Green Goblin

"Weakness is the only true sin."

Green Goblin Courage

"Out, am I?"

"You know how much you've sacrificed to fight me? Everything! But the cunning warrior survives by admitting what he is."

"The cunning warrior survives by admitting what he is."

"I'm something of a scientist myself."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."