The Doctor and Kar in “The Eaters of Light”

Are you sulking?

I'm remembering the dead.

Ah, right. Well, save that for old age.

They're dead because of me.

You know, every moment you waste wallowing about in unhappy thought means more of the living are going to join them. If you want to win a war, remember this: it’s not about you. Believe me, I know. Time to grow up. Time to fight your fight.