Beckett: Well, she's right, you know. I mean, odds are it won't work out. She's just being practical.
Castle: Relationships aren't math problems. You don't solve them by being practical. I mean, what happens if she meets her soul-mate but she doesn't risk it because it's not practical?
Castle: Relationships aren't math problems. You don't solve them by being practical. I mean, what happens if she meets her soul-mate but she doesn't risk it because it's not practical?