DOCTOR: As we learn about each other, so we learn about ourselves.

IAN: I think you should go and apologise to Barbara at once.

DOCTOR: I'm afraid we have no time for codes and manners.

DOCTOR: Rash action is worse than no action at all, hmm?

DOCTOR: We are at... The very beginning. The new start of a solar system. Outside, the atoms are rushing toward each other, fusing, coagulating, until minute little collections of matter are created. And so the process goes on. And on. Until dust is formed. Dust then becomes solid entity, a new birth of a sun! And it's planets!

(The Doctor laughs, gleefully)