DOCTOR: Do you know what thinking is? It’s just a fancy word for changing your mind.

CLARA: So, you must have thought I was dead for a while?

DOCTOR: Yeah.

CLARA: How was that?

DOCTOR: Longest month of my life.

CLARA: It could only have been five minutes.

DOCTOR: I'll be the judge of time.

DOCTOR: Because every time you see them happy you remember how sad they’re going to be. And it breaks your heart. Because what’s the point in them being happy if they’re going to be sad later? The answer is, of course, because they are going to be sad later.

DOCTOR: Everything’s got to end sometime. Otherwise, nothing would ever get started.

DOCTOR: Who's she?

SARDICK: Nobody important.

DOCTOR: Nobody important. Blimey, that's amazing. Do you know, in nine hundred years of time and space, I've never met anyone who wasn't important before.

DOCTOR: In 900 years of time and space, I’ve never met anyone who wasn’t important.

DOCTOR: We’re all stories, in the end. Just make it a good one, eh?

DOCTOR: The way I see it, every life is a pile of good things and bad things. The good things don’t always soften the bad things, but vice versa, the bad things don’t always spoil the good things or make them unimportant.

DOCTOR: All of time and space, everything that ever happened or ever will. Where do you want to start?

DOCTOR: I don’t want to go.

ROSE: Basically, we've been building this, er, this travel machine, this, this er, dimension cannon, so I could. Well, so I could-

DOCTOR: What?

ROSE: So I could come back. Shut up.

DOCTOR: I just want you to know there are worlds out there, safe in the sky because of her. That there are people living in the light, and singing songs of Donna Noble, a thousand million light years away. They will never forget her, while she can never remember. And for one moment, one shining moment, she was the most important woman in the whole wide universe.

ROSE: All right. Both of you, answer me this. When I last stood on this beach, on the worst day of my life, what was the last thing you said to me? Go on, say it.

DOCTOR: I said, Rose Tyler.

ROSE: Yeah, and how was that sentence going to end?

DOCTOR: Does it need saying?

METACRISIS DOCTOR: I'm part human. Specifically, the aging part. I'll grow old and never regenerate. I've only got one life, Rose Tyler. I could spend it with you, if you want.

ROSE: You'll grow old at the same time as me?

METACRISIS DOCTOR: Together.

DONNA: Donna. I'm a human being. Maybe not the stuff of legend but every bit as important as Time Lords, thank you.

ROSE: He was a Time Lord. Last of his kind.

DONNA: But if he was so special, what was he doing with me?

ROSE: He thought you were brilliant.

DONNA: Don't be stupid.

ROSE: But you are. It just took the Doctor to show you that, simply by being with him. He did the same to me. To everyone he touches.

DOCTOR: People assume that time is a strict progression of cause to effect, but actually from a non-linear, non-subjective viewpoint, it's more like a big ball of wibbly-wobbly, timey-wimey... stuff.

DOCTOR: Some people live more in 20 years than others do in 80. It’s not the time that matters, it’s the person.

ROSE: (breaking down) Am I ever gonna see you again?

DOCTOR: You can't.

ROSE: What are you gonna do?

DOCTOR: Oh, I've got the TARDIS. Same old life, last of the Time Lords.

ROSE: On your own?

[The Doctor nods his head]

ROSE: I... I love you.

DOCTOR: Quite right, too. And I suppose, if it's my last chance to say it... Rose Tyler...

DOCTOR: (with Rose on an alien planet) How long are you going to stay with me?

ROSE: Forever.

DOCTOR: I don't age. I regenerate. But humans decay; you wither and you die. Imagine watching that happen to someone that you-- [breaks off]

ROSE: What, Doctor?

DOCTOR: You can spend the rest of your life with me, but I can't spend the rest of mine with you. I have to live on. Alone. That's the curse of the Time Lords.

DOCTOR: You want weapons? We’re in a library! Books! The best weapons in the world!

DOCTOR: Now, first things first. Be honest. How do I look?

ROSE: Umm... different.

DOCTOR: Good different or bad different?

ROSE: Just...different.

DOCTOR: Am I... ginger?

ROSE: No, you're just sort of... brown.

DOCTOR: Aw, I wanted to be ginger! I've never been ginger!

DOCTOR: Well, you could do that. Yeah, you could do that. Of course you could. But why? Look at these people, these human beings. Consider their potential! From the day they arrive on the planet, blinking, step into the sun, there is more to see than can ever be seen, more to do than-- no, hold on. Sorry, that's The Lion King. But the point still stands. Leave them alone!