[Life is definitely not short in Jack's case, but the lives of the people he lets himself care about are, so it's a good point to make. It's one he's come back to time after time, alternating between trying to make the most of every moment he's given, and trying not to care because it's always over far too soon.
He reads the napkin and smiles ruefully.]
Yeah. I know. Love is - well, all that stuff about it being a two-edged sword is accurate enough. Love gives, and then love takes away.