"You lied, Doctor."
"You lied to me when you told me that everything would be all right. You lied to all those ponies when you promised them you'd get them out alive."
"You're a strange and wonderful pony, with your magic box and your crazy mind, that's true."
"But you're also a dangerous pony."
"Look around you, at the destruction you caused because you had to investigate, at the countless lives lost because you thought you could REASON with that - that THING."
"Look around, take it all in, and ask yourself: 'Whose fault is it?'"
"You already know the answer, of course."
"It's your fault."