"There are worlds out there where the sky is burning, and the sea's asleep, and the rivers dream; people made of smoke and cities made of song. Somewhere there's danger, somewhere there's injustice, and somewhere else the tea's getting cold. Come on, Ace. We've got work to do!"
— The Seventh Doctor - Survival
"He's like fire and ice and rage; 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 can see the turn of the universe. And…he's wonderful."
— Timothy Latimer - Family of Blood
" He saves planets, rescues civilizations, defeats terrible creatures. And runs a lot. Seriously, there’s an outrageous amount of running involved."
— Donna Noble - The Doctor’s Daughter
"I'm the Doctor. I'm a Time Lord. I'm from the planet Gallifrey in the constellation of Kasterborous. I am 903 years old and I'm the man who's gonna save your lives, and all six billion people on the planet below."
— The Tenth Doctor - Voyage Of The Damned
"I have lived a long life and I have seen a few things. I walked away from the last Great Time War. I marked the passing of the Time Lords. I saw the birth of the universe and I watched as time ran out, moment by moment, until nothing remained. No time. No space. Just me. I walked in universes where the laws of physics were devised by the mind of a mad man. I've watched universes freeze and creations burn. I've seen things you wouldn't believe. I have lost things you will never understand. And I know things. Secrets that must never be told. Knowledge that must never be spoken."
— The Eleventh Doctor - The Rings of Akhaten
— The Twelfth Doctor, Twice Upon A Time
"Oh, there it is. Silly old universe. The more I save it the more it needs saving. It’s a treadmill. Yes, yes I know they’ll get it all wrong without me. Well, I suppose….one more lifetime won’t kill anyone. Well, except me. You wait a moment, Doctor. Let’s get it right. I’ve got a few things to say to you. Basic stuff first. Never be cruel, never be cowardly. And never ever eat pears! Remember – hate is always foolish…and love, is always wise. Always try to be nice, and never fail to be kind. Oh, and….and you mustn’t tell anyone your name. No-one would understand it anyway. Except…. Except….children. Children can hear it. Sometimes – if their hearts are in the right place, and the stars are too. Children can hear your name. But nobody else. Nobody else. Ever. Laugh hard. Run fast. Be kind. Doctor – I let you go."