... I'm sorry.

[It comes out in a rush, breathless and strained, his voice tight with emotion.]

I know you don't... f-for one thing, I'm too old, and...

[... and I'm not going to live for that much longer. That part he knows he doesn't have to say out loud, not to Day.]

... it's just an old man's selfishness. Please... just forget about this.

[He turns away, not wanting to let Day see the tears in his eyes yet again.]