Long story, but the point is that if you hear hoofbeats in the distance, your first guess is that they're horses, not zebras. And you're hearing hoof… - James S. A. Corey

Show a human a closed door, and no matter how many open doors she finds, she’ll be haunted by what might be behind it.
A few people liked to paint this drive as a weakness. A failing of the species. Humanity as the virus. The creature that never stops filling up its available living space. Hector seemed to be moving over to that view, based on their last conversation. But Anna rejected that idea. If humanity were capable of being satisfied, then they’d all still be living in trees and eating bugs out of one another’s fur. Anna had walked on a moon of Jupiter. She’d looked up through a dome-covered sky at the great red spot, close enough to see the swirls and eddies of a storm larger than her home world. She’d tasted water thawed from ice as old as the solar system itself. And it was that human dissatisfaction, that human audacity, that had put her there.
Looking at the tiny world spinning around her, she knew one day it would give them the stars as well.

Our backup plan is everyone does this right the first time so we don’t need a backup plan. Understood?

Sorry," Bobby said…"I'm pissed at you right now and it's not your fault.
What can I stop not doin' so it ain't my fault anymore?