Disclaimer: Right... I shall now go back in Time, and create the original idea for Doctor Who before 1963, and therefore screwing up the timelines and the fixed points in Time and then I shall own Doctor Who once and for all!
Loss of Emotions.
Dalek Caan hid in the darkness, laughing insanely to himself. His mind had gone, becoming insane, but with it, the Dalek programming. He had emotions, a conscience, and was able to 'see'. He could see the Daleks for what they are: a race destined to conquer. A race which will stop at nothing to achieve their destiny. Conquering the Universe. Caan again laughed insanely. What a destiny. Exterminating.
Dalek Caan could see the Daleks. What they had done through Time and Space. He saw the truth of them, and Caan decreed: No More!
But was Dalek Caan really insane? Or did he just see the Daleks for what they were?