I did what they told us. I waited, Olive. The soldier to come is both natural and unnatural. I waited to be called up. You stay fit; stay focused, and stay ready. I wore the blacks and grays. I blended in. But the call never came. It never came. Then, that man with the glasses, he showed up at the hospital. He spoke all the old words. He said they’re coming. He needed warriors. He said… “What was written will come to pass.” He said he knew how to wake me up. I shouldn’t have listened to him. Sometimes what we wake up, it can’t be put back to sleep.
— Nick Lane to Olivia Dunham | Fringe 1.17: Bad Dreams
And I realized at that moment that despite what I’d promised, what I fully intended to do… that I could never take Peter back. The way she looked at him, I saw in her what I feared most in myself when I saw him. That I couldn’t lose him again. It was the first hole, Olivia. The first breach. The first crack in a pattern of cracks, spaces between the worlds. And it’s my fault. You can’t imagine what it’s like to lose a child.
— Walter Bishop to Olivia Dunham | Fringe 2.16: Peter
When you asked me to come back to this world with you, you said that I belonged with you. And so I came back… for us. And we started seeing each other. And I explained away the differences because our relationship was different. I thought she was you, Olivia.
— Olivia Dunham (as played by Anna Torv) | Fringe 3.09: Marionette