" The Supreme Leader’s voice was flat. “You have compassion for her.” “No—never. Compassion? For an enemy of the Order?” “I perceive the problem,” Snoke intoned. “It isn’t her strength that is making you fail. It’s your weakness.” The rebuke hurt, but Ren didn’t show it. "

― Alan Dean Foster , The Force Awakens (Star Wars: Novelizations, #7)