Rule 1: The Doctor lies.

You don't want to take over the universe. You wouldn't know what to do with it beyond shout at it.

You have to take your own bold approach, and if you do you will be rewarded with success. Or calamitous failure. That can happen too.

I think training in comedy, as it were, a history writing comedy, is a powerful tool for anyone.

Amy Pond: 'I thought... well, I started to think you were just a madman with a box.' The Doctor: 'Amy Pond, there's something you better understand about me, 'cause it's important and one day your life may depend on it. [He Smiles] I am definitely a madman with a box.

Demons run when a good man goes to war. Night will fall and drown the sun when a good man goes to war. Friendship dies and true love lies. Night will fall and the dark will rise when a good man goes to war. Demons run but count the cost; the battle's won but the child is lost.

All lives end. All hearts are broken. Caring is not an advantage.