One may tolerate a world of demons for the sake of an angel.
Everything's got to end sometime. Otherwise nothing would ever get started.
- A Christmas Carol
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.
He's like fire and ice. He's like the night and the storm in the heart of the sun. He's ancient and forever. He burns at the center of time and he can see the turn of the universe. And... he's wonderful.
--Season 3, Episode 9
We're all stories in the end. Just make it a good one, eh?
--Season 5, Episode 13
Never cruel or cowardly. Never give up, never give in.
--The Day of the Doctor
I am and always will be the optimist. The hoper of far-flung hopes and the dreamer of improbable dreams.
-- Season 6, Episode 6
Rose, before I go, I just want to tell you: you were fantastic. Absolutely fantastic. And you know what? So was I.
— The Doctor, Season 1, Episode 13
When you're a kid, they tell you it's all… Grow up, get a job, get married, get a house, have a kid, and that's it. But the truth is, the world is so much stranger than that. It's so much darker. And so much madder. And so much better.
— Elton Pope, Season 2, Episode 10.
There's a lot of things you need to get across this universe. Warp drive… wormhole refractors… You know the thing you need most of all? You need a hand to hold.
— The Doctor, Season 6, Episode 6
You don't just give up. You don't just let things happen. You make a stand! You say no! You have the guts to do what's right, even when everyone else just runs away.
— Rose Tyler, Season 1, Episode 13
Biting's excellent. It's like kissing - only there is a winner.