Endgame Language and Communication Quotes

How we cite our quotes: Citations follow this format: (Act.Line). Every time a character talks counts as one line, even if what they say turns into a long monologue.

Quote #10

HAMM
Before you go…
(Clov halts near door.)
…say something.
CLOV
There is nothing to say.
HAMM
A few words…to ponder…in my heart.
CLOV
Your heart!
HAMM
Yes. (1.781-785)

When was there not nothing to say? Why does Hamm want Clov to make a theatrical exit, to part with words? What do you make of this repeated phrase: "in my heart"? Why do other characters act so indignant when Hamm uses it?