Thunder

“I know that David Tennant's Hamlet isn't till July. And lots of people are going to be doing Dr Who in Hamlet jokes, so this is just me getting it out of the way early, to avoid the rush...
"To be, or not to be, that is the question. Weeelll.... More of A question really. Not THE question. Because, well, I mean, there are billions and billions of questions out there, and well, when I say billions, I mean, when you add in the answers, not just the questions, weeelll, you're looking at numbers that are positively astronomical and... for that matter the other question is what you lot are doing on this planet in the first place, and er, did anyone try just pushing this little red button?”
― Neil Gaiman

“Doctor Who: You want weapons? We're in a library. Books are the best weapon in the world. This room's the greatest arsenal we could have. Arm yourself!

(from Tooth and Claw in Season 2)”
― Russell T. Davies

“Anger is just anger. It isn't good. It isn't bad. It just is. What you do with it is what matters. It's like anything else. You can use it to build or to destroy. You just have to make the choice."

Constructive anger," the demon said, her voice dripping sarcasm.

Also known as passion," I said quietly. "Passion has overthrown tyrants and freed prisoners and slaves. Passion has brought justice where there was savagery. Passion has created freedom where there was nothing but fear. Passion has helped souls rise from the ashes of their horrible lives and build something better, stronger, more beautiful.”
― Jim Butcher, White Night

“Reinette: One may tolerate a world of demons for the sake of an angel.”
― Steven Moffat