Twelve isn't bothered being told to shut-up. He and ... someone... Clara? had exchanged that phrase often enough.

"No one? Never forget that chaos is the metabolism for the universe. Death is the one thing that unifies every single living creature in the universe."

Wow, he had no idea what an idiot he was when he was younger. His life has improved so much now that he can admit being an idiot and being wrong about some things.

He chuckles softly at Ten's declaration.

"You're right. You don't become me."