Who said "Failure is merely a stepping stone to greater conquest."?

This quote is attributed to Green Goblin.

Failure is merely a stepping stone to greater conquest. - Green Goblin

"Failure is merely a stepping stone to greater conquest."

Green Goblin Perseverance

"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."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."