"Could black holes be the key to a quantum theory of gravity, a deeper theory of how reality, of how space and time works? Well, I think so."

"We're stuck at type zero. But what would it take to move between universes? What would it take to enter a black hole? What would it take to break the light barrier?"

“So many things could have happened in a different way that we wouldn't be here at all, both individually, for sure, and certainly as a species.”

“Could black holes be the key to a quantum theory of gravity, a deeper theory of how reality, of how space and time works?”

"It's a very, very beautiful calculation, but it's the best example I know of the relationship between these rather abstract quantities perhaps and something that you can look at in a telescope."