DOCTOR: You know, I used to tell people I walked in Eternity. And the thing about Eternity is, well—it does go on.

I.M. FOREMAN: You’ve never been a woman, have you?

DOCTOR: I’m not sure I’ve ever even been a man.

DOCTOR: I’d like to see a butterfly fit into a chrysalis case after it spreads its wings. Life depends on change, and renewal.