Elizabeth: Sometimes what we have is not the world we want, but we have our hearts and our imaginations to make the best of it. I will promise you this: I will be the best mother I possibly can be to you. I'll take care of you, I will protect you and I will never let anyone take you away from me. No one. Not ever.
Peter: But you're not her, are you? You're not my real mother.
Elizabeth: You were sick. You were very sick for a long, long time and I think it confused you. Yes, I am your mother, of course I am.

Olivia: But, how did you know I'd come here?
Peter: Because it was the only drawing that looked happy.

William, I believe the ideal environment between universes is the unique combination of love and terror she feels there apparently stimulates a cortical reaction.

Elizabeth (reading from Walter's notes)

Aha, the beguiling Olivia Dunham beguiles.

Walter

I know that I sound crazy, but I'm not. I'm not crazy.

Peter

Walter: The texture of the universe has changed from my crossing. It cannot withstand any more damage.
Elizabeth: Neither can he, Walter. He is in constant distress.

Getting him back wasn't as easy as I thought.

Walter

Fringe Season 3 Episode 15 Quotes

Walter: The texture of the universe has changed from my crossing. It cannot withstand any more damage.
Elizabeth: Neither can he, Walter. He is in constant distress.

Getting him back wasn't as easy as I thought.

Walter