Quote from Adrian Monk in Mr. Monk and the End (Part One)
Lt. Steven Albright: So it was a Christmas gift from your wife? Adrian Monk: That's right. She gave it to me just before she died. Judge Ethan Rickover: Yeah, it's just sitting on his bookcase unopened. It's really romantic. Adrian Monk: Oh, I'll never open it. I can't open it. It's the last secret we have. Lt. Steven Albright: I think I understand. It's a way of keeping her alive. Adrian Monk: Exactly.