Don't interfere!" The Doctor silenced her angrily. "I cannot will my own destruction.

You want books? We're in a library-books! The best weapons in the world!-Tenth Docto

There's something that doesn't make sense. Let's go and poke it with a stick.

Wilf: God bless the cactuses! The Doctor: That's cactI. Alien: And that's racist!

Idris: Are all people like this?The Doctor: Like what?Idris: So much bigger on the inside.

How come "burbled" gets to be in the Oxford English Dictionary but "tulgy" doesn't? Hm?

In 900 years of time and space, I've never met someone who wasn't important before.

Okay, this is going to be confusing, kid.-Amelia Pond to her younger self in the pandora box

Kathy Nightingale: What's good about sad? Sally Sparrow: It's happy for deep people.

The Doctor: I've seen bigger.Clara: Really?The Doctor: Are you joking? It's massive!

In the Vortex that lies beyond time and space tumbled a police box that was not a police box.

Never ignore a coincidence. Unless you're busy, in which case, always ignore a coincidence.

Because she deserved more than me. She deserved someone who could give her the whole universe.

Regular running or run for your life running?" asked Amy"What do you think," the Doctor replied.

You should always waste time when you don't have any. Time is not the boss of you. Rule 408.