Ted: I didn't go.
Marshall: What? Why?
Ted: I changed my mind. I don't want to meet her.
Marshall: Why? She sounds perfect.
Ted: I don't want perfect. I want Robin.
Marshall: Oh, God, not this again. Ted, it's a mistake.
Ted: Maybe. But it's a mistake I have to make.
Marshall: Wrong. It's a mistake you don't have to make. Look at the evidence. You and Robin have tried this again and again...
Future Ted: Here's the thing about mistakes. Sometimes, even when you know something's a mistake, you gotta make it anyway. Even really dumb mistakes.