"I fought in a bigger war than you will ever know. I did worse things than you could ever imagine, and when I close my eyes I hear more screams than anyone will ever be able to count. And do you want to know what to do with all that pain? Shall I tell you where you put it? You hold it tight 'til it burns your hand and you say this: 'No one else will ever have to live like this. No one else will ever have to feel this pain. Not on my watch!'"

-The Doctor