Who said "You're not a soldier, you're a child."?

This quote is attributed to Graff.

You're not a soldier, you're a child. - Graff

"You're not a soldier, you're a child."

Graff Courage

Character in Ender's Game

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"A commander's most important job is to give orders that can be obeyed."

"Humanity does not ask us to be happy. It merely asks us to be brilliant on its behalf."

"He's too much a leader already."

"You are the hope of humanity."

"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."