Don't piss off the universe.
Ted: So what do you think?
Barney: Robin again? Ted, the universe clearly does not want you and Robin to be together. Don't piss off the universe. The universe will slap you.
Ted: Don't you think the universe has more important things to worry about than my dating life?
Marshall: Unless your dating life is the glue holding the entire universe together. Whoa, chills. Anybody else get chills?
Ted: Look, I realize we've been down this road before, but the fact is, whatever I do, it all keeps coming back to Robin. So I gotta do this.
[Barney slaps Tedd]
Ted: What the hell?
Barney: That wasn't me. That was the universe.