Rainbow Rowell said this quote

You don't know when you're twenty-three.You don't know what it really means to crawl into someone else's life and stay there. You can't see all the ways you're going to get tangled, how you're going to bond skin to skin. How the idea of separating will feel in five years, in ten - in fifteen. When Georgie thought about divorce now, she imagined lying side by side with Neal on two operating tables while a team of doctors tried to unthread their vascular systems.She didn't know at twenty-three.