Michael Scott: Well, that's easy for you to say. You have a bad imagination. It's stupid. I live in a fantasy world.
Jim: You do?
Michael Scott: Yes, Jim, I do. And I can't stay in a relationship that is full of lies and deceit.
Jim: But you didn't believe any of this was true five minutes ago.
Michael Scott: That's what makes it so wrong.
[aside to camera:]
Michael Scott: Ever since I found out that Donna might be cheating on me, I have not eaten or slept. This not knowing, that's what's killing me.