"There are two kinds of pain. The sort of pain that makes you strong, or useless pain. The sort of pain that's only suffering. I have no patience for useless things."

Linda Vasquez: "I know he made you a promise, but circumstances have changed."
Francis Underwood: "The nature of promises, Linda, is that they remain immune to changing circumstances."

"I love that woman. I love her more than sharks love blood."

"I never make such big decisions so long after sunset and so far from dawn."

Zoe Barnes: "We're in a very gray area. Ethically, legally. Which I'm okay with..."
Francis Underwood: "I just love this painting, don't you? We're in the same boat now, Zoe. Take care not to tip it over, I can only save one of us."

Francis: "I am sorry!"
Claire: "No! That I won't accept..."
Francis: "What?"
Claire: "Apologies! My husband doesn't apologize, even to me."