Who said "Doubt is the first step toward defeat."?

This quote is attributed to Obadiah Stane.

Doubt is the first step toward defeat. - Obadiah Stane

"Doubt is the first step toward defeat."

Obadiah Stane Courage

"I'm not a man to be trifled with."

"Success isn't given, it's taken."

"The weak deserve what they get."

"Money makes the world spin."

"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."