Adapted for Christmas:

Kramer: Do you ever rejoice?
George: Rejoice? Do I rejoice?
Kramer: I rejoice.
George Costanza: You rejoice.
Kramer: Oh, yes. Yes, I rejoice. Often, I... I sit... and rejoice. Have you rejoiced?
George Costanza: Well, not recently. I'm glad all the time, constant gladness... but I haven't rejoiced.