Ted: I used to believe in destiny, you know? I'd go to the bagel place, see a pretty girl in line reading my favorite novel, whistling the song that's been stuck in my head all week and I'd think, "Wow. Hey, maybe she's the one. "Now I think, "I just know that bitch is gonna take the last whole-wheat everything bagel."
Robin: You've just been focused on work.
Ted: No, it's more than that. I've stopped believing. Not in some depressed, "I'm gonna cry during my toast" way. Not in a way I even noticed until tonight. It's just, every day, I think I believe a little less and a little less and a little less. And that... sucks. What do I do about that, Scherbatsky?
Robin: You're Ted Mosby. You start believing again.
Ted: In what, destiny?
Robin: Chemistry. If you have chemistry, you only need one other thing.
Ted: What's that?
Robin: Timing. But timing's a bitch.