Quotes: Bigger on the Inside
"It's quite easy to do this, actually. At least, so they tell me. Apparently, if you shrink time, you can expand space."
"It's a lot roomier in here than it looks from the outside. Some would even argue that it's impossible."
Look at my girl. Look at her go. BIGGER ON THE INSIDE! See, House, that's your problem. Size of a planet, but on the inside you are just! So! Small!
— The Doctor, "The Doctor's Wife"