Jake

“Dalek: I will talk to the Doctor.
The Doctor: Oh will you? That's nice. Hello!
Dalek: The Dalek strategem nears completion. The fleet is almost ready. You will not intervene.
The Doctor: Oh really? Why's that, then?
Dalek: We have your associate. You will obey or she will be exterminated.
The Doctor: No.
Dalek: Explain yourself.
The Doctor: I said, "No."
Dalek: What is the meaning of this negative?
The Doctor: It means, "No."
Dalek: But she will be destroyed!
The Doctor: No! 'Cause this is what I'm gonna do. I'm gonna rescue her. I'm gonna save Rose Tyler from the middle of the Dalek fleet, and then I'm gonna save the Earth. And then—just to finish off—I'm gonna wipe every last stinking Dalek out of the sky!
Dalek: But you have no weapons, no defenses, no plan.
The Doctor: Yeah! And doesn't that scare you to death? Rose?
Rose: Yes, Doctor?
The Doctor: I'm coming to get you.”
― Russell T. Davies

“When you run with the Doctor, it feels like it'll never end. But however hard you try you can't run forever. Everybody knows that everybody dies and nobody knows it like the Doctor. But I do think that all the skies of all the worlds might just turn dark if he ever for one moment, accepts it. Everybody knows that everybody dies. But not every day. Not today. Some days are special. Some days are so, so blessed. Some days, nobody dies at all. (In the library, the Doctor walks back to the TARDIS. He stops, looking at the doors. Then he raises his hand, and stands there poised like that for a long moment. Finally he snaps his fingers. The doors open. He smiles slowly and walks in, joining Donna. Then he snaps his fingers again, and the doors close. River's voice continues over this.) Now and then, every once in a very long while, every day in a million days, when the wind stands fair, and the Doctor comes to call... everybody lives.”
― Steven Moffat

“The Doctor: Amazing.
Nancy: What is?
The Doctor: 1941. Right now, not very far from here, the German war machine is rolling up the map of Europe. Country after country, falling like dominoes. Nothing can stop it, nothing. Until one tiny, damp little island says "No. No, not here." A mouse in front of a lion. You're amazing, the lot of you. I don't know what you do to Hitler, but you frighten the hell out of me.”
― Steven Moffat

“The universe is big, its vast and complicated, and ridiculous. And sometimes, very rarely, impossible things just happen and we call them miracles. And that's the theory. Nine hundred years, never seen one yet, but this would do me.”
― Steven Moffat