Dwight K. Schrute: Gotta clear out this cabinet, people, a lot of these are dead accounts. "Scranton Mimeograph Corp?" I don't think we're doing business with them any time soon. That's odd. A letter from Robert Dunder. "A valuable artifact has come into my possession. I have hidden it until such time as a person of strong intellect may safely recover it. This golden chalice is of immeasurable historical and religious significance." The Holy Grail.
[later:]
Pam: [on phone]: Did you send Dwight on a quest for the Holy Grail?
Jim: I think I'm a little too busy these days to s- [whispering] Oh ,my God. I did send Dwight on a quest for the Holy Grail.
[later:]
Jim: The Dunder Code! I completely forgot about that prank. That had to be like six or seven years ago. Stayed late every night for a month. Had a lot more free time back then.

Dwight K. Schrute: Customer Loyalty. What is it? Can you hold it in your hand? Can you nudge it with your finger? Can you dump it on a woman? No. Why? Because it's an idea. But what does it mean?
Kevin: Oh, it's when you get a free sandwich after you've already eaten ten sandwiches.

Nellie: Oh, no, no, no, no. Oh God. Andy has just started to be nice to me, I just sent his girlfriend into the arms of a younger man. And I CC'd him on every incriminating memo. "Pete and Erin, don't hold back. Our social media presence should be hot, hot, hot. Go at it vigorously." I did everything but unzip their pants for them. Oh, God, Nellie.