DOCTOR: Oh, the blossomiest blossom. That's the only sad thing. I want to know what happens next. Right, then. Doctor Whoever-I'm-about-to-be. Tag, you're it.

DOCTOR: I know there aren’t many certainties in any of our lives, but Umbreen, Prem, what I see you in you is the certainty you have in each other. Something I believe in my faith. Love, in all its forms, is the most powerful weapon we have, because love is a form of hope and, like hope, love abides in the face of everything. You both found love with each other. You believed in it, you fought for it, and you waited for it. And now, you’re committing to it. Which makes you, right now, the two strongest people on this planet.

DOCTOR: I'm the Doctor.

MABLI: A doctor of medicine?

DOCTOR: Well, medicine, science, engineering, candyfloss, LEGO, philosophy, music, problems, people, hope. Mostly hope.

DOCTOR: There are worlds out there where the sky is burning, where 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!

DOCTOR: Our lives are different to anybody else’s. That’s the exciting thing. There’s nobody in the universe can do what we’re doing.